72178804 has 12 divisors (see below), whose sum is σ = 133743204. Its totient is φ = 33966464.

The previous prime is 72178783. The next prime is 72178817. The reversal of 72178804 is 40887127.

It can be written as a sum of positive squares in 2 ways, for example, as 64834704 + 7344100 = 8052^2 + 2710^2 .

It is a congruent number.

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, 530659 + ... + 530794.

It is an arithmetic number, because the mean of its divisors is an integer number (11145267).

Almost surely, 2^72178804 is an apocalyptic number.

It is an amenable number.

72178804 is a deficient number, since it is larger than the sum of its proper divisors (61564400).

72178804 is a wasteful number, since it uses less digits than its factorization.

72178804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061474 (or 1061472 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 72178804 is about 8495.8109677652. The cubic root of 72178804 is about 416.3608570659.

The spelling of 72178804 in words is "seventy-two million, one hundred seventy-eight thousand, eight hundred four".