55588390 has 32 divisors (see below), whose sum is σ = 117554976. Its totient is φ = 18658560.

The previous prime is 55588387. The next prime is 55588483. The reversal of 55588390 is 9388555.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18007 + ... + 20866.

It is an arithmetic number, because the mean of its divisors is an integer number (3673593).

Almost surely, 2^55588390 is an apocalyptic number.

55588390 is an abundant number, since it is smaller than the sum of its proper divisors (61966586).

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

55588390 is a wasteful number, since it uses less digits than its factorization.

55588390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38904.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 55588390 is about 7455.7622011435. The cubic root of 55588390 is about 381.6465714923.

The spelling of 55588390 in words is "fifty-five million, five hundred eighty-eight thousand, three hundred ninety".