72866380 has 24 divisors (see below), whose sum is σ = 153220032. Its totient is φ = 29108352.

The previous prime is 72866371. The next prime is 72866407. The reversal of 72866380 is 8366827.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17149 + ... + 20971.

It is an arithmetic number, because the mean of its divisors is an integer number (6384168).

Almost surely, 2^72866380 is an apocalyptic number.

It is an amenable number.

72866380 is an abundant number, since it is smaller than the sum of its proper divisors (80353652).

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

72866380 is a wasteful number, since it uses less digits than its factorization.

72866380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4785 (or 4783 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 72866380 is about 8536.1806447614. The cubic root of 72866380 is about 417.6787669545.

The spelling of 72866380 in words is "seventy-two million, eight hundred sixty-six thousand, three hundred eighty".