164220490 has 32 divisors (see below), whose sum is σ = 340940160. Its totient is φ = 55785024.

The previous prime is 164220487. The next prime is 164220517. The reversal of 164220490 is 94022461.

164220490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3132 + ... + 18391.

It is an arithmetic number, because the mean of its divisors is an integer number (10654380).

Almost surely, 2^164220490 is an apocalyptic number.

164220490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164220490 is an abundant number, since it is smaller than the sum of its proper divisors (176719670).

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

164220490 is a wasteful number, since it uses less digits than its factorization.

164220490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21646.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 164220490 is about 12814.8542715085. The cubic root of 164220490 is about 547.6155618814.

The spelling of 164220490 in words is "one hundred sixty-four million, two hundred twenty thousand, four hundred ninety".