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772220 = 22538611
BaseRepresentation
bin10111100100001111100
31110020021202
42330201330
5144202340
624315032
76364241
oct2744174
91406252
10772220
114881a9
12312a78
13210647
141615c8
15103c15
hexbc87c

772220 has 12 divisors (see below), whose sum is σ = 1621704. Its totient is φ = 308880.

The previous prime is 772207. The next prime is 772229. The reversal of 772220 is 22277.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 38611 = 772220 / (7 + 7 + 2 + 2 + 2 + 0).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 772192 and 772201.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 772220.

It is not an unprimeable number, because it can be changed into a prime (772229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19286 + ... + 19325.

It is an arithmetic number, because the mean of its divisors is an integer number (135142).

2772220 is an apocalyptic number.

It is an amenable number.

772220 is an abundant number, since it is smaller than the sum of its proper divisors (849484).

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

772220 is a wasteful number, since it uses less digits than its factorization.

772220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38620 (or 38618 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 772220 is about 878.7604906913. The cubic root of 772220 is about 91.7445655546.

Adding to 772220 its reverse (22277), we get a palindrome (794497).

It can be divided in two parts, 7 and 72220, that added together give a palindrome (72227).

The spelling of 772220 in words is "seven hundred seventy-two thousand, two hundred twenty", and thus it is an iban number.

Divisors: 1 2 4 5 10 20 38611 77222 154444 193055 386110 772220