72670647 has 16 divisors (see below), whose sum is σ = 110938112. Its totient is φ = 41450400.

The previous prime is 72670613. The next prime is 72670651. The reversal of 72670647 is 74607627.

It is a happy number.

It is not a de Polignac number, because 72670647 - 2⁶ = 72670583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72670667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9897 + ... + 15597.

It is an arithmetic number, because the mean of its divisors is an integer number (6933632).

Almost surely, 2^72670647 is an apocalyptic number.

72670647 is a deficient number, since it is larger than the sum of its proper divisors (38267465).

72670647 is a wasteful number, since it uses less digits than its factorization.

72670647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6318.

The product of its (nonzero) digits is 98784, while the sum is 39.

The square root of 72670647 is about 8524.7080301908. The cubic root of 72670647 is about 417.3044432980.

The spelling of 72670647 in words is "seventy-two million, six hundred seventy thousand, six hundred forty-seven".