55956540 has 24 divisors (see below), whose sum is σ = 156678480. Its totient is φ = 14921728.

The previous prime is 55956533. The next prime is 55956541. The reversal of 55956540 is 4565955.

It is a super-2 number, since 2×55956540² = 6262268737543200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55956541) 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, 466245 + ... + 466364.

It is an arithmetic number, because the mean of its divisors is an integer number (6528270).

Almost surely, 2^55956540 is an apocalyptic number.

It is an amenable number.

55956540 is an abundant number, since it is smaller than the sum of its proper divisors (100721940).

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

55956540 is a wasteful number, since it uses less digits than its factorization.

55956540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932621 (or 932619 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 55956540 is about 7480.4104165480. The cubic root of 55956540 is about 382.4872395248.

The spelling of 55956540 in words is "fifty-five million, nine hundred fifty-six thousand, five hundred forty".