72678907 has 12 divisors (see below), whose sum is σ = 84829680. Its totient is φ = 62086416.

The previous prime is 72678889. The next prime is 72678923. The reversal of 72678907 is 70987627.

It is a de Polignac number, because none of the positive numbers 2^k-72678907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72678007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13194 + ... + 17872.

It is an arithmetic number, because the mean of its divisors is an integer number (7069140).

Almost surely, 2^72678907 is an apocalyptic number.

72678907 is a deficient number, since it is larger than the sum of its proper divisors (12150773).

72678907 is a wasteful number, since it uses less digits than its factorization.

72678907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010 (or 5003 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 72678907 is about 8525.1924904954. The cubic root of 72678907 is about 417.3202534600.

The spelling of 72678907 in words is "seventy-two million, six hundred seventy-eight thousand, nine hundred seven".