72840492 has 24 divisors (see below), whose sum is σ = 188846000. Its totient is φ = 24280128.

The previous prime is 72840487. The next prime is 72840499. The reversal of 72840492 is 29404827.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (72840499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337117 + ... + 337332.

Almost surely, 2^72840492 is an apocalyptic number.

It is an amenable number.

72840492 is an abundant number, since it is smaller than the sum of its proper divisors (116005508).

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

72840492 is a wasteful number, since it uses less digits than its factorization.

72840492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674462 (or 674454 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 72840492 is about 8534.6641410193. The cubic root of 72840492 is about 417.6292967292.

The spelling of 72840492 in words is "seventy-two million, eight hundred forty thousand, four hundred ninety-two".