72770715 has 24 divisors (see below), whose sum is σ = 130487760. Its totient is φ = 37472064.

The previous prime is 72770699. The next prime is 72770717. The reversal of 72770715 is 51707727.

It is a happy number.

It is not a de Polignac number, because 72770715 - 2⁴ = 72770699 is a prime.

It is a super-2 number, since 2×72770715² = 10591153923222450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72770715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72770717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26577 + ... + 29186.

It is an arithmetic number, because the mean of its divisors is an integer number (5436990).

Almost surely, 2^72770715 is an apocalyptic number.

72770715 is a deficient number, since it is larger than the sum of its proper divisors (57717045).

72770715 is a wasteful number, since it uses less digits than its factorization.

72770715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55803 (or 55800 counting only the distinct ones).

The product of its (nonzero) digits is 24010, while the sum is 36.

The square root of 72770715 is about 8530.5753029910. The cubic root of 72770715 is about 417.4958991792.

The spelling of 72770715 in words is "seventy-two million, seven hundred seventy thousand, seven hundred fifteen".