72784940 has 24 divisors (see below), whose sum is σ = 155004192. Its totient is φ = 28703360.

The previous prime is 72784927. The next prime is 72784951. The reversal of 72784940 is 4948727.

It is a super-3 number, since 3×72784940³ (a number of 25 digits) contains 333 as substring.

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, 24209 + ... + 27048.

It is an arithmetic number, because the mean of its divisors is an integer number (6458508).

Almost surely, 2^72784940 is an apocalyptic number.

It is an amenable number.

72784940 is an abundant number, since it is smaller than the sum of its proper divisors (82219252).

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

72784940 is a wasteful number, since it uses less digits than its factorization.

72784940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51337 (or 51335 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 72784940 is about 8531.4090278218. The cubic root of 72784940 is about 417.5231010202.

The spelling of 72784940 in words is "seventy-two million, seven hundred eighty-four thousand, nine hundred forty".