72871320 has 32 divisors (see below), whose sum is σ = 218614320. Its totient is φ = 19432320.

The previous prime is 72871307. The next prime is 72871321. The reversal of 72871320 is 2317827.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72871321) 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, 303511 + ... + 303750.

Almost surely, 2^72871320 is an apocalyptic number.

It is an amenable number.

72871320 is an abundant number, since it is smaller than the sum of its proper divisors (145743000).

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

72871320 is a wasteful number, since it uses less digits than its factorization.

72871320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607275 (or 607271 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 72871320 is about 8536.4699964330. The cubic root of 72871320 is about 417.6882056306.

The spelling of 72871320 in words is "seventy-two million, eight hundred seventy-one thousand, three hundred twenty".