3947390840 has 32 divisors (see below), whose sum is σ = 8890680960. Its totient is φ = 1577347200.

The previous prime is 3947390807. The next prime is 3947390861. The reversal of 3947390840 is 480937493.

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 7 ways as a sum of consecutive naturals, for example, 10151 + ... + 89430.

It is an arithmetic number, because the mean of its divisors is an integer number (277833780).

Almost surely, 2^3947390840 is an apocalyptic number.

It is an amenable number.

3947390840 is an abundant number, since it is smaller than the sum of its proper divisors (4943290120).

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

3947390840 is a wasteful number, since it uses less digits than its factorization.

3947390840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100583 (or 100579 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 3947390840 is about 62828.2646585118. The cubic root of 3947390840 is about 1580.4109970700.

The spelling of 3947390840 in words is "three billion, nine hundred forty-seven million, three hundred ninety thousand, eight hundred forty".