3986940 has 24 divisors (see below), whose sum is σ = 11163600. Its totient is φ = 1063168.

The previous prime is 3986929. The next prime is 3986951. The reversal of 3986940 is 496893.

3986940 = 296² + 297² + ... + 335².

It is an interprime number because it is at equal distance from previous prime (3986929) and next prime (3986951).

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

It is an Ulam number.

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, 33165 + ... + 33284.

It is an arithmetic number, because the mean of its divisors is an integer number (465150).

Almost surely, 2^3986940 is an apocalyptic number.

3986940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3986940 is an abundant number, since it is smaller than the sum of its proper divisors (7176660).

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

3986940 is a wasteful number, since it uses less digits than its factorization.

3986940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66461 (or 66459 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 3986940 is about 1996.7323305841. The cubic root of 3986940 is about 158.5671546844.

The spelling of 3986940 in words is "three million, nine hundred eighty-six thousand, nine hundred forty".