8258728728 has 32 divisors (see below), whose sum is σ = 21150405360. Its totient is φ = 2685765120.

The previous prime is 8258728711. The next prime is 8258728747. The reversal of 8258728728 is 8278278528.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4195525 + ... + 4197492.

Almost surely, 2^8258728728 is an apocalyptic number.

It is an amenable number.

8258728728 is an abundant number, since it is smaller than the sum of its proper divisors (12891676632).

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

8258728728 is a wasteful number, since it uses less digits than its factorization.

8258728728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8393067 (or 8393063 counting only the distinct ones).

The product of its digits is 8028160, while the sum is 57.

The square root of 8258728728 is about 90877.5479862876. The cubic root of 8258728728 is about 2021.3323830713.

The spelling of 8258728728 in words is "eight billion, two hundred fifty-eight million, seven hundred twenty-eight thousand, seven hundred twenty-eight".