55789290 has 32 divisors (see below), whose sum is σ = 148772160. Its totient is φ = 14877072.

The previous prime is 55789289. The next prime is 55789297. The reversal of 55789290 is 9298755.

It is a happy number.

55789290 is a `hidden beast` number, since 557 + 8 + 9 + 2 + 90 = 666.

It is a super-2 number, since 2×55789290² = 6224889757408200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (55789297) 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, 103044 + ... + 103583.

It is an arithmetic number, because the mean of its divisors is an integer number (4649130).

Almost surely, 2^55789290 is an apocalyptic number.

55789290 is an abundant number, since it is smaller than the sum of its proper divisors (92982870).

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

55789290 is a wasteful number, since it uses less digits than its factorization.

55789290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206643 (or 206637 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 55789290 is about 7469.2228511405. Note that the first 3 decimals coincide. The cubic root of 55789290 is about 382.1057837752.

The spelling of 55789290 in words is "fifty-five million, seven hundred eighty-nine thousand, two hundred ninety".