55538790 has 32 divisors (see below), whose sum is σ = 139090176. Its totient is φ = 14166240.

The previous prime is 55538783. The next prime is 55538797. The reversal of 55538790 is 9783555.

It is an interprime number because it is at equal distance from previous prime (55538783) and next prime (55538797).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55538797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39556 + ... + 40935.

It is an arithmetic number, because the mean of its divisors is an integer number (4346568).

Almost surely, 2^55538790 is an apocalyptic number.

55538790 is an abundant number, since it is smaller than the sum of its proper divisors (83551386).

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

55538790 is a wasteful number, since it uses less digits than its factorization.

55538790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80524.

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

The square root of 55538790 is about 7452.4351724789. The cubic root of 55538790 is about 381.5330267822.

The spelling of 55538790 in words is "fifty-five million, five hundred thirty-eight thousand, seven hundred ninety".