72487655 has 4 divisors (see below), whose sum is σ = 86985192. Its totient is φ = 57990120.

The previous prime is 72487627. The next prime is 72487669. The reversal of 72487655 is 55678427.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-72487655 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7248761 + ... + 7248770.

It is an arithmetic number, because the mean of its divisors is an integer number (21746298).

Almost surely, 2^72487655 is an apocalyptic number.

72487655 is a deficient number, since it is larger than the sum of its proper divisors (14497537).

72487655 is a wasteful number, since it uses less digits than its factorization.

72487655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14497536.

The product of its digits is 470400, while the sum is 44.

The square root of 72487655 is about 8513.9682287403. The cubic root of 72487655 is about 416.9538773563.

The spelling of 72487655 in words is "seventy-two million, four hundred eighty-seven thousand, six hundred fifty-five".