3947274820 has 24 divisors (see below), whose sum is σ = 8406030528. Its totient is φ = 1556671200.

The previous prime is 3947274797. The next prime is 3947274823. The reversal of 3947274820 is 284727493.

It is not an unprimeable number, because it can be changed into a prime (3947274823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1388466 + ... + 1391305.

It is an arithmetic number, because the mean of its divisors is an integer number (350251272).

Almost surely, 2^3947274820 is an apocalyptic number.

It is an amenable number.

3947274820 is an abundant number, since it is smaller than the sum of its proper divisors (4458755708).

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

3947274820 is a wasteful number, since it uses less digits than its factorization.

3947274820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779851 (or 2779849 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 46.

The square root of 3947274820 is about 62827.3413411709. The cubic root of 3947274820 is about 1580.3955133334.

The spelling of 3947274820 in words is "three billion, nine hundred forty-seven million, two hundred seventy-four thousand, eight hundred twenty".