55789990 has 16 divisors (see below), whose sum is σ = 102069360. Its totient is φ = 21949920.

The previous prime is 55789967. The next prime is 55790003. The reversal of 55789990 is 9998755.

55789990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55789990² = 6225045968400200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45120 + ... + 46339.

It is an arithmetic number, because the mean of its divisors is an integer number (6379335).

Almost surely, 2^55789990 is an apocalyptic number.

55789990 is a deficient number, since it is larger than the sum of its proper divisors (46279370).

55789990 is a wasteful number, since it uses less digits than its factorization.

55789990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91527.

The product of its (nonzero) digits is 1020600, while the sum is 52.

The square root of 55789990 is about 7469.2697099516. The cubic root of 55789990 is about 382.1073818892.

The spelling of 55789990 in words is "fifty-five million, seven hundred eighty-nine thousand, nine hundred ninety".