72628387904 has 28 divisors (see below), whose sum is σ = 152599721724. Its totient is φ = 34178064384.

The previous prime is 72628387861. The next prime is 72628387907. The reversal of 72628387904 is 40978382627.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 60048522304 + 12579865600 = 245048^2 + 112160^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72628387904.

It is not an unprimeable number, because it can be changed into a prime (72628387907) 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, 33375929 + ... + 33378104.

Almost surely, 2^72628387904 is an apocalyptic number.

It is an amenable number.

72628387904 is an abundant number, since it is smaller than the sum of its proper divisors (79971333820).

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

72628387904 is a wasteful number, since it uses less digits than its factorization.

72628387904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66754062 (or 66754052 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 72628387904 in words is "seventy-two billion, six hundred twenty-eight million, three hundred eighty-seven thousand, nine hundred four".