3900990 has 32 divisors (see below), whose sum is σ = 9914400. Its totient is φ = 978944.

The previous prime is 3900989. The next prime is 3901013. The reversal of 3900990 is 990093.

It is a Harshad number since it is a multiple of its sum of digits (30).

3900990 is a modest number, since divided by 990 gives 390 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3315 + ... + 4334.

It is an arithmetic number, because the mean of its divisors is an integer number (309825).

Almost surely, 2^3900990 is an apocalyptic number.

3900990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3900990 is an abundant number, since it is smaller than the sum of its proper divisors (6013410).

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

3900990 is a wasteful number, since it uses less digits than its factorization.

3900990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7676.

The product of its (nonzero) digits is 2187, while the sum is 30.

The square root of 3900990 is about 1975.0924029017. The cubic root of 3900990 is about 157.4194095133.

The spelling of 3900990 in words is "three million, nine hundred thousand, nine hundred ninety".