3947794928 has 80 divisors (see below), whose sum is σ = 9586219776. Its totient is φ = 1530040320.

The previous prime is 3947794919. The next prime is 3947794931. The reversal of 3947794928 is 8294977493.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229475 + ... + 246077.

Almost surely, 2^3947794928 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 3947794928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4793109888).

3947794928 is an abundant number, since it is smaller than the sum of its proper divisors (5638424848).

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

3947794928 is a wasteful number, since it uses less digits than its factorization.

3947794928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16822 (or 16816 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 62.

The square root of 3947794928 is about 62831.4803900083. The cubic root of 3947794928 is about 1580.4649232670.

The spelling of 3947794928 in words is "three billion, nine hundred forty-seven million, seven hundred ninety-four thousand, nine hundred twenty-eight".