55640292 has 36 divisors (see below), whose sum is σ = 132711600. Its totient is φ = 18143504.

The previous prime is 55640287. The next prime is 55640399. The reversal of 55640292 is 29204655.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25459 + ... + 27557.

Almost surely, 2^55640292 is an apocalyptic number.

It is an amenable number.

55640292 is an abundant number, since it is smaller than the sum of its proper divisors (77071308).

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

55640292 is a wasteful number, since it uses less digits than its factorization.

55640292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200 (or 2151 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 55640292 is about 7459.2420526485. The cubic root of 55640292 is about 381.7653136654.

The spelling of 55640292 in words is "fifty-five million, six hundred forty thousand, two hundred ninety-two".