55690988 has 12 divisors (see below), whose sum is σ = 97537440. Its totient is φ = 27823152.

The previous prime is 55690979. The next prime is 55691011. The reversal of 55690988 is 88909655.

It is a happy number.

It is a super-2 number, since 2×55690988² = 6202972288832288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845 + ... + 10587.

It is an arithmetic number, because the mean of its divisors is an integer number (8128120).

Almost surely, 2^55690988 is an apocalyptic number.

It is an amenable number.

55690988 is a deficient number, since it is larger than the sum of its proper divisors (41846452).

55690988 is a wasteful number, since it uses less digits than its factorization.

55690988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11176 (or 11174 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 50.

The square root of 55690988 is about 7462.6394794335. The cubic root of 55690988 is about 381.8812254658.

The spelling of 55690988 in words is "fifty-five million, six hundred ninety thousand, nine hundred eighty-eight".