55640704 has 32 divisors (see below), whose sum is σ = 126684000. Its totient is φ = 23845632.

The previous prime is 55640701. The next prime is 55640707. The reversal of 55640704 is 40704655.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55640701) and next prime (55640707).

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (55640701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30154 + ... + 31945.

It is an arithmetic number, because the mean of its divisors is an integer number (3958875).

Almost surely, 2^55640704 is an apocalyptic number.

It is an amenable number.

55640704 is an abundant number, since it is smaller than the sum of its proper divisors (71043296).

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

55640704 is an equidigital number, since it uses as much as digits as its factorization.

55640704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62120 (or 62108 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 55640704 is about 7459.2696693443. The cubic root of 55640704 is about 381.7662559497.

The spelling of 55640704 in words is "fifty-five million, six hundred forty thousand, seven hundred four".