72169392 has 20 divisors (see below), whose sum is σ = 186437720. Its totient is φ = 24056448.

The previous prime is 72169387. The next prime is 72169397. The reversal of 72169392 is 29396127.

It is an interprime number because it is at equal distance from previous prime (72169387) and next prime (72169397).

It is a super-2 number, since 2×72169392² = 10416842283299328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72169392.

It is not an unprimeable number, because it can be changed into a prime (72169397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751717 + ... + 751812.

It is an arithmetic number, because the mean of its divisors is an integer number (9321886).

Almost surely, 2^72169392 is an apocalyptic number.

It is an amenable number.

72169392 is an abundant number, since it is smaller than the sum of its proper divisors (114268328).

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

72169392 is a wasteful number, since it uses less digits than its factorization.

72169392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503540 (or 1503534 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 72169392 is about 8495.2570296607. The cubic root of 72169392 is about 416.3427586837.

The spelling of 72169392 in words is "seventy-two million, one hundred sixty-nine thousand, three hundred ninety-two".