55560090 has 16 divisors (see below), whose sum is σ = 133344288. Its totient is φ = 14816016.

The previous prime is 55560083. The next prime is 55560121. The reversal of 55560090 is 9006555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1852003 = 55560090 / (5 + 5 + 5 + 6 + 0 + 0 + 9 + 0).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925972 + ... + 926031.

It is an arithmetic number, because the mean of its divisors is an integer number (8334018).

Almost surely, 2^55560090 is an apocalyptic number.

55560090 is an abundant number, since it is smaller than the sum of its proper divisors (77784198).

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

55560090 is a wasteful number, since it uses less digits than its factorization.

55560090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852013.

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 55560090 is about 7453.8640985733. The cubic root of 55560090 is about 381.5817951883.

The spelling of 55560090 in words is "fifty-five million, five hundred sixty thousand, ninety".