164238190 has 32 divisors (see below), whose sum is σ = 321490944. Its totient is φ = 60157440.

The previous prime is 164238157. The next prime is 164238233. The reversal of 164238190 is 91832461.

164238190 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 2×164238190² = 53948366108952200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

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, 6766 + ... + 19345.

It is an arithmetic number, because the mean of its divisors is an integer number (10046592).

Almost surely, 2^164238190 is an apocalyptic number.

164238190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164238190 is a deficient number, since it is larger than the sum of its proper divisors (157252754).

164238190 is a wasteful number, since it uses less digits than its factorization.

164238190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26172.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 164238190 is about 12815.5448577109. The cubic root of 164238190 is about 547.6352355271.

The spelling of 164238190 in words is "one hundred sixty-four million, two hundred thirty-eight thousand, one hundred ninety".