72304770 has 32 divisors (see below), whose sum is σ = 175327488. Its totient is φ = 19081728.

The previous prime is 72304759. The next prime is 72304777. The reversal of 72304770 is 7740327.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (72304777) 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, 9514 + ... + 15333.

It is an arithmetic number, because the mean of its divisors is an integer number (5478984).

Almost surely, 2^72304770 is an apocalyptic number.

72304770 is an abundant number, since it is smaller than the sum of its proper divisors (103022718).

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

72304770 is a wasteful number, since it uses less digits than its factorization.

72304770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24954.

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 72304770 is about 8503.2211543626. The cubic root of 72304770 is about 416.6029264275.

The spelling of 72304770 in words is "seventy-two million, three hundred four thousand, seven hundred seventy".