3990402 has 24 divisors (see below), whose sum is σ = 9311484. Its totient is φ = 1227744.

The previous prime is 3990383. The next prime is 3990419. The reversal of 3990402 is 2040993.

3990402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3721041 + 269361 = 1929^2 + 519^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8293 + ... + 8760.

Almost surely, 2^3990402 is an apocalyptic number.

3990402 is an abundant number, since it is smaller than the sum of its proper divisors (5321082).

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

3990402 is a wasteful number, since it uses less digits than its factorization.

3990402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17074 (or 17071 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 3990402 is about 1997.5990588704. The cubic root of 3990402 is about 158.6130378824.

The spelling of 3990402 in words is "three million, nine hundred ninety thousand, four hundred two".