55730090 has 16 divisors (see below), whose sum is σ = 108030888. Its totient is φ = 20577216.

The previous prime is 55730069. The next prime is 55730099. The reversal of 55730090 is 9003755.

It can be written as a sum of positive squares in 4 ways, for example, as 30459361 + 25270729 = 5519^2 + 5027^2 .

It is not an unprimeable number, because it can be changed into a prime (55730099) 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, 214217 + ... + 214476.

Almost surely, 2^55730090 is an apocalyptic number.

55730090 is a deficient number, since it is larger than the sum of its proper divisors (52300798).

55730090 is a wasteful number, since it uses less digits than its factorization.

55730090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428713.

The product of its (nonzero) digits is 4725, while the sum is 29.

The square root of 55730090 is about 7465.2588702603. The cubic root of 55730090 is about 381.9705805948.

The spelling of 55730090 in words is "fifty-five million, seven hundred thirty thousand, ninety".