72293888 has 20 divisors (see below), whose sum is σ = 144447600. Its totient is φ = 36146688.

The previous prime is 72293873. The next prime is 72293951. The reversal of 72293888 is 88839227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70088 + ... + 71111.

It is an arithmetic number, because the mean of its divisors is an integer number (7222380).

Almost surely, 2^72293888 is an apocalyptic number.

It is an amenable number.

72293888 is a deficient number, since it is larger than the sum of its proper divisors (72153712).

72293888 is an equidigital number, since it uses as much as digits as its factorization.

72293888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141217 (or 141201 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 72293888 is about 8502.5812551248. The cubic root of 72293888 is about 416.5820255451.

The spelling of 72293888 in words is "seventy-two million, two hundred ninety-three thousand, eight hundred eighty-eight".