72770164 has 12 divisors (see below), whose sum is σ = 131739300. Its totient is φ = 35130368.

The previous prime is 72770161. The next prime is 72770177. The reversal of 72770164 is 46107727.

It can be written as a sum of positive squares in 2 ways, for example, as 44997264 + 27772900 = 6708^2 + 5270^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72770161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313549 + ... + 313780.

It is an arithmetic number, because the mean of its divisors is an integer number (10978275).

Almost surely, 2^72770164 is an apocalyptic number.

It is an amenable number.

72770164 is a deficient number, since it is larger than the sum of its proper divisors (58969136).

72770164 is a wasteful number, since it uses less digits than its factorization.

72770164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627362 (or 627360 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 72770164 is about 8530.5430073355. The cubic root of 72770164 is about 417.4948454549.

The spelling of 72770164 in words is "seventy-two million, seven hundred seventy thousand, one hundred sixty-four".