72165378 has 16 divisors (see below), whose sum is σ = 146777760. Its totient is φ = 23647296.

The previous prime is 72165377. The next prime is 72165389. The reversal of 72165378 is 87356127.

It is not an unprimeable number, because it can be changed into a prime (72165377) 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, 101575 + ... + 102282.

It is an arithmetic number, because the mean of its divisors is an integer number (9173610).

Almost surely, 2^72165378 is an apocalyptic number.

72165378 is an abundant number, since it is smaller than the sum of its proper divisors (74612382).

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

72165378 is a wasteful number, since it uses less digits than its factorization.

72165378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203921.

The product of its digits is 70560, while the sum is 39.

The square root of 72165378 is about 8495.0207769022. The cubic root of 72165378 is about 416.3350396643.

The spelling of 72165378 in words is "seventy-two million, one hundred sixty-five thousand, three hundred seventy-eight".