72047164 has 24 divisors (see below), whose sum is σ = 151679360. Its totient is φ = 29252016.

The previous prime is 72047153. The next prime is 72047167. The reversal of 72047164 is 46174027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72047167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67182 + ... + 68245.

Almost surely, 2^72047164 is an apocalyptic number.

It is an amenable number.

72047164 is an abundant number, since it is smaller than the sum of its proper divisors (79632196).

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

72047164 is a wasteful number, since it uses less digits than its factorization.

72047164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135457 (or 135455 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 72047164 is about 8488.0600846130. The cubic root of 72047164 is about 416.1075828139.

The spelling of 72047164 in words is "seventy-two million, forty-seven thousand, one hundred sixty-four".