72340812 has 18 divisors (see below), whose sum is σ = 182861588. Its totient is φ = 24113592.

The previous prime is 72340811. The next prime is 72340817. The reversal of 72340812 is 21804327.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (72340811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1004698 + ... + 1004769.

Almost surely, 2^72340812 is an apocalyptic number.

It is an amenable number.

72340812 is an abundant number, since it is smaller than the sum of its proper divisors (110520776).

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

72340812 is a wasteful number, since it uses less digits than its factorization.

72340812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009477 (or 2009472 counting only the distinct ones).

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

The square root of 72340812 is about 8505.3402048360. The cubic root of 72340812 is about 416.6721367460.

The spelling of 72340812 in words is "seventy-two million, three hundred forty thousand, eight hundred twelve".