72740012 has 36 divisors (see below), whose sum is σ = 133459200. Its totient is φ = 34685280.

The previous prime is 72739987. The next prime is 72740029. The reversal of 72740012 is 21004727.

It is a super-2 number, since 2×72740012² = 10582218691520288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72740012.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 488114 + ... + 488262.

It is an arithmetic number, because the mean of its divisors is an integer number (3707200).

Almost surely, 2^72740012 is an apocalyptic number.

It is an amenable number.

72740012 is a deficient number, since it is larger than the sum of its proper divisors (60719188).

72740012 is a wasteful number, since it uses less digits than its factorization.

72740012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 72740012 is about 8528.7755275889. The cubic root of 72740012 is about 417.4371750997.

Adding to 72740012 its reverse (21004727), we get a palindrome (93744739).

The spelling of 72740012 in words is "seventy-two million, seven hundred forty thousand, twelve".