55640760 has 64 divisors (see below), whose sum is σ = 190771200. Its totient is φ = 12717696.

The previous prime is 55640747. The next prime is 55640771. The reversal of 55640760 is 6704655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32280 + ... + 33959.

It is an arithmetic number, because the mean of its divisors is an integer number (2980800).

Almost surely, 2^55640760 is an apocalyptic number.

It is an amenable number.

55640760 is an abundant number, since it is smaller than the sum of its proper divisors (135130440).

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

55640760 is a wasteful number, since it uses less digits than its factorization.

55640760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66260 (or 66256 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 55640760 is about 7459.2734230621. The cubic root of 55640760 is about 381.7663840268.

The spelling of 55640760 in words is "fifty-five million, six hundred forty thousand, seven hundred sixty".