72436144 has 20 divisors (see below), whose sum is σ = 153104040. Its totient is φ = 32925440.

The previous prime is 72436141. The next prime is 72436159. The reversal of 72436144 is 44163427.

It is not an unprimeable number, because it can be changed into a prime (72436141) 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, 205609 + ... + 205960.

It is an arithmetic number, because the mean of its divisors is an integer number (7655202).

Almost surely, 2^72436144 is an apocalyptic number.

It is an amenable number.

72436144 is an abundant number, since it is smaller than the sum of its proper divisors (80667896).

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

72436144 is a wasteful number, since it uses less digits than its factorization.

72436144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411588 (or 411582 counting only the distinct ones).

The product of its digits is 16128, while the sum is 31.

The square root of 72436144 is about 8510.9426034958. The cubic root of 72436144 is about 416.8550890378.

The spelling of 72436144 in words is "seventy-two million, four hundred thirty-six thousand, one hundred forty-four".