3998812 has 24 divisors (see below), whose sum is σ = 7373520. Its totient is φ = 1895040.

The previous prime is 3998809. The next prime is 3998821. The reversal of 3998812 is 2188993.

It is a super-2 number, since 2×3998812² = 31980994822688, which contains 22 as substring.

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, 5739 + ... + 6397.

It is an arithmetic number, because the mean of its divisors is an integer number (307230).

Almost surely, 2^3998812 is an apocalyptic number.

It is an amenable number.

3998812 is a deficient number, since it is larger than the sum of its proper divisors (3374708).

3998812 is a wasteful number, since it uses less digits than its factorization.

3998812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 739 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 3998812 is about 1999.7029779445. The cubic root of 3998812 is about 158.7243883703.

It can be divided in two parts, 39988 and 12, that added together give a square (40000 = 200²).

The spelling of 3998812 in words is "three million, nine hundred ninety-eight thousand, eight hundred twelve".