72165308 has 12 divisors (see below), whose sum is σ = 127540392. Its totient is φ = 35725200.

The previous prime is 72165307. The next prime is 72165377. The reversal of 72165308 is 80356127.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72165307) 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, 88910 + ... + 89717.

It is an arithmetic number, because the mean of its divisors is an integer number (10628366).

Almost surely, 2^72165308 is an apocalyptic number.

It is an amenable number.

72165308 is a deficient number, since it is larger than the sum of its proper divisors (55375084).

72165308 is a wasteful number, since it uses less digits than its factorization.

72165308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178732 (or 178730 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 72165308 is about 8495.0166568406. The cubic root of 72165308 is about 416.3349050500.

The spelling of 72165308 in words is "seventy-two million, one hundred sixty-five thousand, three hundred eight".