72870681 has 32 divisors (see below), whose sum is σ = 112752640. Its totient is φ = 41477184.

The previous prime is 72870659. The next prime is 72870683. The reversal of 72870681 is 18607827.

It is not a de Polignac number, because 72870681 - 2¹¹ = 72868633 is a prime.

It is a super-2 number, since 2×72870681² = 10620272298807522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (72870683) 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, 30720 + ... + 33006.

It is an arithmetic number, because the mean of its divisors is an integer number (3523520).

Almost surely, 2^72870681 is an apocalyptic number.

It is an amenable number.

72870681 is a deficient number, since it is larger than the sum of its proper divisors (39881959).

72870681 is a wasteful number, since it uses less digits than its factorization.

72870681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 72870681 is about 8536.4325687022. The cubic root of 72870681 is about 417.6869847408.

The spelling of 72870681 in words is "seventy-two million, eight hundred seventy thousand, six hundred eighty-one".