72178572 has 12 divisors (see below), whose sum is σ = 168416696. Its totient is φ = 24059520.

The previous prime is 72178537. The next prime is 72178591. The reversal of 72178572 is 27587127.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 72178572.

It is an unprimeable number.

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, 3007429 + ... + 3007452.

Almost surely, 2^72178572 is an apocalyptic number.

It is an amenable number.

72178572 is an abundant number, since it is smaller than the sum of its proper divisors (96238124).

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

72178572 is a wasteful number, since it uses less digits than its factorization.

72178572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6014888 (or 6014886 counting only the distinct ones).

The product of its digits is 54880, while the sum is 39.

The square root of 72178572 is about 8495.7973139665. The cubic root of 72178572 is about 416.3604109708.

The spelling of 72178572 in words is "seventy-two million, one hundred seventy-eight thousand, five hundred seventy-two".