72920115 has 16 divisors (see below), whose sum is σ = 129636000. Its totient is φ = 38890656.

The previous prime is 72920101. The next prime is 72920117. The reversal of 72920115 is 51102927.

It is not a de Polignac number, because 72920115 - 2⁵ = 72920083 is a prime.

It is a super-2 number, since 2×72920115² = 10634686343226450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (72920117) 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, 269940 + ... + 270209.

It is an arithmetic number, because the mean of its divisors is an integer number (8102250).

Almost surely, 2^72920115 is an apocalyptic number.

72920115 is a deficient number, since it is larger than the sum of its proper divisors (56715885).

72920115 is a wasteful number, since it uses less digits than its factorization.

72920115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540163 (or 540157 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 72920115 is about 8539.3275496376. The cubic root of 72920115 is about 417.7814135327.

The spelling of 72920115 in words is "seventy-two million, nine hundred twenty thousand, one hundred fifteen".