3172858728 has 48 divisors (see below), whose sum is σ = 8589258720. Its totient is φ = 976262976.

The previous prime is 3172858723. The next prime is 3172858729. The reversal of 3172858728 is 8278582713.

It is not an unprimeable number, because it can be changed into a prime (3172858723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387076 + ... + 395187.

It is an arithmetic number, because the mean of its divisors is an integer number (178942890).

Almost surely, 2^3172858728 is an apocalyptic number.

It is an amenable number.

3172858728 is an abundant number, since it is smaller than the sum of its proper divisors (5416399992).

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

3172858728 is a wasteful number, since it uses less digits than its factorization.

3172858728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782298 (or 782281 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 51.

The square root of 3172858728 is about 56328.1344267676. The cubic root of 3172858728 is about 1469.4345439593.

The spelling of 3172858728 in words is "three billion, one hundred seventy-two million, eight hundred fifty-eight thousand, seven hundred twenty-eight".