164608990 has 64 divisors (see below), whose sum is σ = 371661696. Its totient is φ = 51098112.

The previous prime is 164608987. The next prime is 164609009. The reversal of 164608990 is 99806461.

It is a super-2 number, since 2×164608990² = 54192239177640200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46524 + ... + 49936.

It is an arithmetic number, because the mean of its divisors is an integer number (5807214).

Almost surely, 2^164608990 is an apocalyptic number.

164608990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164608990 is an abundant number, since it is smaller than the sum of its proper divisors (207052706).

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

164608990 is a wasteful number, since it uses less digits than its factorization.

164608990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 164608990 is about 12830.0035074040. The cubic root of 164608990 is about 548.0470571593.

The spelling of 164608990 in words is "one hundred sixty-four million, six hundred eight thousand, nine hundred ninety".