72013812 has 24 divisors (see below), whose sum is σ = 180958176. Its totient is φ = 22158048.

The previous prime is 72013801. The next prime is 72013847. The reversal of 72013812 is 21831027.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230658 + ... + 230969.

It is an arithmetic number, because the mean of its divisors is an integer number (7539924).

Almost surely, 2^72013812 is an apocalyptic number.

It is an amenable number.

72013812 is an abundant number, since it is smaller than the sum of its proper divisors (108944364).

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

72013812 is a wasteful number, since it uses less digits than its factorization.

72013812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461647 (or 461645 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 72013812 is about 8486.0952151151. The cubic root of 72013812 is about 416.0433648704.

Adding to 72013812 its reverse (21831027), we get a palindrome (93844839).

The spelling of 72013812 in words is "seventy-two million, thirteen thousand, eight hundred twelve".