55907880 has 256 divisors, whose sum is σ = 210124800. Its totient is φ = 11612160.

The previous prime is 55907879. The next prime is 55907881. The reversal of 55907880 is 8870955.

It is an interprime number because it is at equal distance from previous prime (55907879) and next prime (55907881).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (55907881) 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 63 ways as a sum of consecutive naturals, for example, 494704 + ... + 494816.

It is an arithmetic number, because the mean of its divisors is an integer number (820800).

Almost surely, 2^55907880 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 55907880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105062400).

55907880 is an abundant number, since it is smaller than the sum of its proper divisors (154216920).

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

55907880 is a wasteful number, since it uses less digits than its factorization.

55907880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 42.

The square root of 55907880 is about 7477.1572138079. The cubic root of 55907880 is about 382.3763366309.

The spelling of 55907880 in words is "fifty-five million, nine hundred seven thousand, eight hundred eighty".