164381504 has 28 divisors (see below), whose sum is σ = 372794784. Its totient is φ = 70449024.

The previous prime is 164381453. The next prime is 164381507. The reversal of 164381504 is 405183461.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164381507) 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, 183014 + ... + 183909.

Almost surely, 2^164381504 is an apocalyptic number.

164381504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

164381504 is an abundant number, since it is smaller than the sum of its proper divisors (208413280).

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

164381504 is an equidigital number, since it uses as much as digits as its factorization.

164381504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366942 (or 366932 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 164381504 is about 12821.1350511567. The cubic root of 164381504 is about 547.7944777816.

The spelling of 164381504 in words is "one hundred sixty-four million, three hundred eighty-one thousand, five hundred four".