72797730 has 16 divisors (see below), whose sum is σ = 174714624. Its totient is φ = 19412720.

The previous prime is 72797713. The next prime is 72797731. The reversal of 72797730 is 3779727.

It is not an unprimeable number, because it can be changed into a prime (72797731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213266 + ... + 1213325.

It is an arithmetic number, because the mean of its divisors is an integer number (10919664).

Almost surely, 2^72797730 is an apocalyptic number.

72797730 is an abundant number, since it is smaller than the sum of its proper divisors (101916894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72797730 is a wasteful number, since it uses less digits than its factorization.

72797730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426601.

The product of its (nonzero) digits is 129654, while the sum is 42.

The square root of 72797730 is about 8532.1585779919. The cubic root of 72797730 is about 417.5475557480.

The spelling of 72797730 in words is "seventy-two million, seven hundred ninety-seven thousand, seven hundred thirty".