55640486 has 32 divisors (see below), whose sum is σ = 93169440. Its totient is φ = 24710400.

The previous prime is 55640477. The next prime is 55640509. The reversal of 55640486 is 68404655.

It is a super-3 number, since 3×55640486³ (a number of 24 digits) contains 333 as substring.

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, 307316 + ... + 307496.

It is an arithmetic number, because the mean of its divisors is an integer number (2911545).

Almost surely, 2^55640486 is an apocalyptic number.

55640486 is a deficient number, since it is larger than the sum of its proper divisors (37528954).

55640486 is a wasteful number, since it uses less digits than its factorization.

55640486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 55640486 is about 7459.2550566394. The cubic root of 55640486 is about 381.7657573629.

The spelling of 55640486 in words is "fifty-five million, six hundred forty thousand, four hundred eighty-six".