164438256 has 20 divisors (see below), whose sum is σ = 424798952. Its totient is φ = 54812736.

The previous prime is 164438231. The next prime is 164438257. The reversal of 164438256 is 652834461.

It is a super-3 number, since 3×164438256³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164438257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1712851 + ... + 1712946.

Almost surely, 2^164438256 is an apocalyptic number.

164438256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

164438256 is an abundant number, since it is smaller than the sum of its proper divisors (260360696).

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

164438256 is a wasteful number, since it uses less digits than its factorization.

164438256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425808 (or 3425802 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 164438256 is about 12823.3480807471. The cubic root of 164438256 is about 547.8575117491.

The spelling of 164438256 in words is "one hundred sixty-four million, four hundred thirty-eight thousand, two hundred fifty-six".