72160578 has 32 divisors (see below), whose sum is σ = 183265920. Its totient is φ = 20617200.

The previous prime is 72160567. The next prime is 72160601. The reversal of 72160578 is 87506127.

72160578 is a `hidden beast` number, since 7 + 21 + 60 + 578 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95073 + ... + 95828.

It is an arithmetic number, because the mean of its divisors is an integer number (5727060).

Almost surely, 2^72160578 is an apocalyptic number.

72160578 is an abundant number, since it is smaller than the sum of its proper divisors (111105342).

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

72160578 is a wasteful number, since it uses less digits than its factorization.

72160578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190919 (or 190913 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 72160578 is about 8494.7382537663. The cubic root of 72160578 is about 416.3258087720.

The spelling of 72160578 in words is "seventy-two million, one hundred sixty thousand, five hundred seventy-eight".