72870707 has 32 divisors (see below), whose sum is σ = 94711680. Its totient is φ = 54512640.

The previous prime is 72870701. The next prime is 72870713. The reversal of 72870707 is 70707827.

It is an interprime number because it is at equal distance from previous prime (72870701) and next prime (72870713).

It is not a de Polignac number, because 72870707 - 2¹⁰ = 72869683 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (72870701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139607 + ... + 140127.

It is an arithmetic number, because the mean of its divisors is an integer number (2959740).

Almost surely, 2^72870707 is an apocalyptic number.

72870707 is a deficient number, since it is larger than the sum of its proper divisors (21840973).

72870707 is a wasteful number, since it uses less digits than its factorization.

72870707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623.

The product of its (nonzero) digits is 38416, while the sum is 38.

The square root of 72870707 is about 8536.4340915865. The cubic root of 72870707 is about 417.6870344172.

The spelling of 72870707 in words is "seventy-two million, eight hundred seventy thousand, seven hundred seven".