55479280 has 40 divisors (see below), whose sum is σ = 132482592. Its totient is φ = 21590784.

The previous prime is 55479269. The next prime is 55479311. The reversal of 55479280 is 8297455.

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

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6412 + ... + 12331.

Almost surely, 2^55479280 is an apocalyptic number.

It is an amenable number.

55479280 is an abundant number, since it is smaller than the sum of its proper divisors (77003312).

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

55479280 is a wasteful number, since it uses less digits than its factorization.

55479280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18793 (or 18787 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 55479280 is about 7448.4414477124. The cubic root of 55479280 is about 381.3967067750.

The spelling of 55479280 in words is "fifty-five million, four hundred seventy-nine thousand, two hundred eighty".