55649808 has 40 divisors (see below), whose sum is σ = 159736800. Its totient is φ = 18549792.

The previous prime is 55649807. The next prime is 55649819. The reversal of 55649808 is 80894655.

55649808 is a `hidden beast` number, since 5 + 564 + 9 + 80 + 8 = 666.

It is a super-2 number, since 2×55649808² = 6193802260873728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55649807) 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, 63978 + ... + 64841.

It is an arithmetic number, because the mean of its divisors is an integer number (3993420).

Almost surely, 2^55649808 is an apocalyptic number.

It is an amenable number.

55649808 is an abundant number, since it is smaller than the sum of its proper divisors (104086992).

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

55649808 is a wasteful number, since it uses less digits than its factorization.

55649808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128836 (or 128824 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 55649808 is about 7459.8798917945. The cubic root of 55649808 is about 381.7870765013.

The spelling of 55649808 in words is "fifty-five million, six hundred forty-nine thousand, eight hundred eight".