3975816 has 32 divisors (see below), whose sum is σ = 10704960. Its totient is φ = 1223232.

The previous prime is 3975791. The next prime is 3975827. The reversal of 3975816 is 6185793.

3975816 = T₂₀₀ + T₂₀₁ + ... + T₃₁₆.

It is a super-2 number, since 2×3975816² = 31614225731712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 6060 + ... + 6683.

It is an arithmetic number, because the mean of its divisors is an integer number (334530).

Almost surely, 2^3975816 is an apocalyptic number.

It is an amenable number.

3975816 is an abundant number, since it is smaller than the sum of its proper divisors (6729144).

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

3975816 is a wasteful number, since it uses less digits than its factorization.

3975816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12765 (or 12761 counting only the distinct ones).

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

The square root of 3975816 is about 1993.9448337404. The cubic root of 3975816 is about 158.4195440633.

It can be divided in two parts, 39 and 75816, that added together give a triangular number (75855 = T₃₈₉).

The spelling of 3975816 in words is "three million, nine hundred seventy-five thousand, eight hundred sixteen".