55840560 has 40 divisors (see below), whose sum is σ = 173106480. Its totient is φ = 14890752.

The previous prime is 55840513. The next prime is 55840567. The reversal of 55840560 is 6504855.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×55840560² = 6236336282227200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55840567) 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 7 ways as a sum of consecutive naturals, for example, 116095 + ... + 116574.

It is an arithmetic number, because the mean of its divisors is an integer number (4327662).

Almost surely, 2^55840560 is an apocalyptic number.

It is an amenable number.

55840560 is an abundant number, since it is smaller than the sum of its proper divisors (117265920).

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

55840560 is a wasteful number, since it uses less digits than its factorization.

55840560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232685 (or 232679 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 55840560 is about 7472.6541469547. The cubic root of 55840560 is about 382.2227988594. Note that the first 3 decimals are identical.

The spelling of 55840560 in words is "fifty-five million, eight hundred forty thousand, five hundred sixty".