3990742 has 16 divisors (see below), whose sum is σ = 6954912. Its totient is φ = 1681920.

The previous prime is 3990737. The next prime is 3990761. The reversal of 3990742 is 2470993.

It is a junction number, because it is equal to n+sod(n) for n = 3990698 and 3990707.

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 7 ways as a sum of consecutive naturals, for example, 1483 + ... + 3190.

It is an arithmetic number, because the mean of its divisors is an integer number (434682).

Almost surely, 2^3990742 is an apocalyptic number.

3990742 is a deficient number, since it is larger than the sum of its proper divisors (2964170).

3990742 is a wasteful number, since it uses less digits than its factorization.

3990742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4743.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 3990742 is about 1997.6841592204. The cubic root of 3990742 is about 158.6175425999.

The spelling of 3990742 in words is "three million, nine hundred ninety thousand, seven hundred forty-two".