72279872 has 28 divisors (see below), whose sum is σ = 163921440. Its totient is φ = 30976896.

The previous prime is 72279871. The next prime is 72279887. The reversal of 72279872 is 27897227.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72279871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80222 + ... + 81117.

Almost surely, 2^72279872 is an apocalyptic number.

It is an amenable number.

72279872 is an abundant number, since it is smaller than the sum of its proper divisors (91641568).

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

72279872 is a wasteful number, since it uses less digits than its factorization.

72279872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161358 (or 161348 counting only the distinct ones).

The product of its digits is 197568, while the sum is 44.

The square root of 72279872 is about 8501.7569948805. The cubic root of 72279872 is about 416.5551021485. Note that the first 3 decimals are identical.

The spelling of 72279872 in words is "seventy-two million, two hundred seventy-nine thousand, eight hundred seventy-two".