55806090 has 32 divisors (see below), whose sum is σ = 134205120. Its totient is φ = 14851584.

The previous prime is 55806089. The next prime is 55806133. The reversal of 55806090 is 9060855.

It is a super-2 number, since 2×55806090² = 6228639362176200, which contains 22 as substring.

It is a Curzon 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, 16026 + ... + 19194.

It is an arithmetic number, because the mean of its divisors is an integer number (4193910).

Almost surely, 2^55806090 is an apocalyptic number.

55806090 is an abundant number, since it is smaller than the sum of its proper divisors (78399030).

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

55806090 is a wasteful number, since it uses less digits than its factorization.

55806090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 55806090 is about 7470.3473814810. The cubic root of 55806090 is about 382.1441348214.

The spelling of 55806090 in words is "fifty-five million, eight hundred six thousand, ninety".