3251668728 has 64 divisors (see below), whose sum is σ = 10135077120. Its totient is φ = 844588800.

The previous prime is 3251668699. The next prime is 3251668733. The reversal of 3251668728 is 8278661523.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877933 + ... + 881628.

It is an arithmetic number, because the mean of its divisors is an integer number (158360580).

Almost surely, 2^3251668728 is an apocalyptic number.

It is an amenable number.

3251668728 is an abundant number, since it is smaller than the sum of its proper divisors (6883408392).

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

3251668728 is a wasteful number, since it uses less digits than its factorization.

3251668728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759588 (or 1759584 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 3251668728 is about 57023.4050894894. The cubic root of 3251668728 is about 1481.5015087819.

The spelling of 3251668728 in words is "three billion, two hundred fifty-one million, six hundred sixty-eight thousand, seven hundred twenty-eight".