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742220 = 225173759
BaseRepresentation
bin10110101001101001100
31101201010122
42311031030
5142222340
623524112
76210623
oct2651514
91351118
10742220
11467706
122b9638
131ccaab
141546ba
15e9db5
hexb534c

742220 has 48 divisors (see below), whose sum is σ = 1723680. Its totient is φ = 267264.

The previous prime is 742219. The next prime is 742229. The reversal of 742220 is 22247.

742220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (742229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12551 + ... + 12609.

It is an arithmetic number, because the mean of its divisors is an integer number (35910).

2742220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 742220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (861840).

742220 is an abundant number, since it is smaller than the sum of its proper divisors (981460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

742220 is a wasteful number, since it uses less digits than its factorization.

742220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 742220 is about 861.5219091817. The cubic root of 742220 is about 90.5407770821.

742220 divided by its sum of digits (17) gives a triangular number (43660 = T295).

Adding to 742220 its reverse (22247), we get a palindrome (764467).

The spelling of 742220 in words is "seven hundred forty-two thousand, two hundred twenty", and thus it is an iban number.

Divisors: 1 2 4 5 10 17 20 34 37 59 68 74 85 118 148 170 185 236 295 340 370 590 629 740 1003 1180 1258 2006 2183 2516 3145 4012 4366 5015 6290 8732 10030 10915 12580 20060 21830 37111 43660 74222 148444 185555 371110 742220