55804686 has 16 divisors (see below), whose sum is σ = 127553664. Its totient is φ = 15944184.

The previous prime is 55804663. The next prime is 55804687. The reversal of 55804686 is 68640855.

It is a super-2 number, since 2×55804686² = 6228325959117192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1328683 = 55804686 / (5 + 5 + 8 + 0 + 4 + 6 + 8 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55804687) 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, 664300 + ... + 664383.

It is an arithmetic number, because the mean of its divisors is an integer number (7972104).

Almost surely, 2^55804686 is an apocalyptic number.

55804686 is an abundant number, since it is smaller than the sum of its proper divisors (71748978).

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

55804686 is a wasteful number, since it uses less digits than its factorization.

55804686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328695.

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 55804686 is about 7470.2534093563. The cubic root of 55804686 is about 382.1409300644.

The spelling of 55804686 in words is "fifty-five million, eight hundred four thousand, six hundred eighty-six".