72655480 has 16 divisors (see below), whose sum is σ = 163474920. Its totient is φ = 29062176.

The previous prime is 72655477. The next prime is 72655489. The reversal of 72655480 is 8455627.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72655489) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 908154 + ... + 908233.

Almost surely, 2^72655480 is an apocalyptic number.

It is an amenable number.

72655480 is an abundant number, since it is smaller than the sum of its proper divisors (90819440).

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

72655480 is a wasteful number, since it uses less digits than its factorization.

72655480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816398 (or 1816394 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 72655480 is about 8523.8183931851. The cubic root of 72655480 is about 417.2754095816.

The spelling of 72655480 in words is "seventy-two million, six hundred fifty-five thousand, four hundred eighty".