55790189 has 16 divisors (see below), whose sum is σ = 68923008. Its totient is φ = 43975872.

The previous prime is 55790179. The next prime is 55790197. The reversal of 55790189 is 98109755.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55790189 is a prime.

It is a super-2 number, since 2×55790189² = 6225090377311442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55790159) 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, 26939 + ... + 28935.

It is an arithmetic number, because the mean of its divisors is an integer number (4307688).

Almost surely, 2^55790189 is an apocalyptic number.

It is an amenable number.

55790189 is a deficient number, since it is larger than the sum of its proper divisors (13132819).

55790189 is a wasteful number, since it uses less digits than its factorization.

55790189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2324.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 55790189 is about 7469.2830311885. The cubic root of 55790189 is about 382.1078362077.

The spelling of 55790189 in words is "fifty-five million, seven hundred ninety thousand, one hundred eighty-nine".