72428887500 has 144 divisors (see below), whose sum is σ = 216950676768. Its totient is φ = 18792000000.

The previous prime is 72428887441. The next prime is 72428887513. The reversal of 72428887500 is 578882427.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1361400 + ... + 1413600.

It is an arithmetic number, because the mean of its divisors is an integer number (1506601922).

Almost surely, 2^72428887500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72428887500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108475338384).

72428887500 is an abundant number, since it is smaller than the sum of its proper divisors (144521789268).

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

72428887500 is a wasteful number, since it uses less digits than its factorization.

72428887500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52270 (or 52248 counting only the distinct ones).

The product of its (nonzero) digits is 2007040, while the sum is 51.

The spelling of 72428887500 in words is "seventy-two billion, four hundred twenty-eight million, eight hundred eighty-seven thousand, five hundred".