72178026 has 16 divisors (see below), whose sum is σ = 144586944. Its totient is φ = 24020864.

The previous prime is 72178019. The next prime is 72178061. The reversal of 72178026 is 62087127.

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 7 ways as a sum of consecutive naturals, for example, 5415 + ... + 13178.

It is an arithmetic number, because the mean of its divisors is an integer number (9036684).

Almost surely, 2^72178026 is an apocalyptic number.

72178026 is an abundant number, since it is smaller than the sum of its proper divisors (72408918).

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

72178026 is a wasteful number, since it uses less digits than its factorization.

72178026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19245.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 72178026 is about 8495.7651803707. The cubic root of 72178026 is about 416.3593611054.

The spelling of 72178026 in words is "seventy-two million, one hundred seventy-eight thousand, twenty-six".