3957816 has 32 divisors (see below), whose sum is σ = 10164240. Its totient is φ = 1283328.

The previous prime is 3957799. The next prime is 3957829. The reversal of 3957816 is 6187593.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 1341 + ... + 3116.

Almost surely, 2^3957816 is an apocalyptic number.

It is an amenable number.

3957816 is an abundant number, since it is smaller than the sum of its proper divisors (6206424).

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

3957816 is a wasteful number, since it uses less digits than its factorization.

3957816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4503 (or 4499 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 3957816 is about 1989.4260478842. The cubic root of 3957816 is about 158.1801075975.

The spelling of 3957816 in words is "three million, nine hundred fifty-seven thousand, eight hundred sixteen".