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3455220 = 223557587
BaseRepresentation
bin1101001011100011110100
320111112200010
431023203310
51341031340
6202020220
741240346
oct15134364
96445603
103455220
111a4aa5a
1211a7670
1393c912
1465d296
15483b80
hex34b8f4

3455220 has 24 divisors (see below), whose sum is σ = 9674784. Its totient is φ = 921376.

The previous prime is 3455219. The next prime is 3455227. The reversal of 3455220 is 225543.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3455227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28734 + ... + 28853.

It is an arithmetic number, because the mean of its divisors is an integer number (403116).

Almost surely, 23455220 is an apocalyptic number.

3455220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3455220 is an abundant number, since it is smaller than the sum of its proper divisors (6219564).

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

3455220 is a wasteful number, since it uses less digits than its factorization.

3455220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57599 (or 57597 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 3455220 is about 1858.8222077434. The cubic root of 3455220 is about 151.1791508443.

It can be divided in two parts, 345 and 5220, that added together give a triangular number (5565 = T105).

The spelling of 3455220 in words is "three million, four hundred fifty-five thousand, two hundred twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 57587 115174 172761 230348 287935 345522 575870 691044 863805 1151740 1727610 3455220