2170828728 has 32 divisors (see below), whose sum is σ = 6030080400. Its totient is φ = 723609504.

The previous prime is 2170828703. The next prime is 2170828741. The reversal of 2170828728 is 8278280712.

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, 5024851 + ... + 5025282.

Almost surely, 2^2170828728 is an apocalyptic number.

It is an amenable number.

2170828728 is an abundant number, since it is smaller than the sum of its proper divisors (3859251672).

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

2170828728 is a wasteful number, since it uses less digits than its factorization.

2170828728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10050148 (or 10050138 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 2170828728 is about 46592.1530732376. The cubic root of 2170828728 is about 1294.8173796735.

The spelling of 2170828728 in words is "two billion, one hundred seventy million, eight hundred twenty-eight thousand, seven hundred twenty-eight".