72304812 has 60 divisors (see below), whose sum is σ = 193664856. Its totient is φ = 23509440.

The previous prime is 72304811. The next prime is 72304819. The reversal of 72304812 is 21840327.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72304811) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10563 + ... + 16005.

Almost surely, 2^72304812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72304812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96832428).

72304812 is an abundant number, since it is smaller than the sum of its proper divisors (121360044).

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

72304812 is a wasteful number, since it uses less digits than its factorization.

72304812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500 (or 5489 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 72304812 is about 8503.2236240146. The cubic root of 72304812 is about 416.6030070922.

The spelling of 72304812 in words is "seventy-two million, three hundred four thousand, eight hundred twelve".