72655320 has 64 divisors (see below), whose sum is σ = 225008640. Its totient is φ = 18748800.

The previous prime is 72655313. The next prime is 72655333. The reversal of 72655320 is 2355627.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6046 + ... + 13485.

It is an arithmetic number, because the mean of its divisors is an integer number (3515760).

Almost surely, 2^72655320 is an apocalyptic number.

It is an amenable number.

72655320 is an abundant number, since it is smaller than the sum of its proper divisors (152353320).

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

72655320 is a wasteful number, since it uses less digits than its factorization.

72655320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19576 (or 19572 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 72655320 is about 8523.8090077148. The cubic root of 72655320 is about 417.2751032771.

The spelling of 72655320 in words is "seventy-two million, six hundred fifty-five thousand, three hundred twenty".