55590387 has 8 divisors (see below), whose sum is σ = 74197200. Its totient is φ = 37021920.

The previous prime is 55590377. The next prime is 55590389. The reversal of 55590387 is 78309555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55590387 - 2¹⁰ = 55589363 is a prime.

It is a super-2 number, since 2×55590387² = 6180582253619538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55590389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6012 + ... + 12137.

It is an arithmetic number, because the mean of its divisors is an integer number (9274650).

Almost surely, 2^55590387 is an apocalyptic number.

55590387 is a deficient number, since it is larger than the sum of its proper divisors (18606813).

55590387 is a wasteful number, since it uses less digits than its factorization.

55590387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19173.

The product of its (nonzero) digits is 189000, while the sum is 42.

The square root of 55590387 is about 7455.8961232034. The cubic root of 55590387 is about 381.6511416257.

The spelling of 55590387 in words is "fifty-five million, five hundred ninety thousand, three hundred eighty-seven".