3990424 has 8 divisors (see below), whose sum is σ = 7482060. Its totient is φ = 1995208.

The previous prime is 3990419. The next prime is 3990449. The reversal of 3990424 is 4240993.

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249394 + ... + 249409.

Almost surely, 2^3990424 is an apocalyptic number.

It is an amenable number.

3990424 is a deficient number, since it is larger than the sum of its proper divisors (3491636).

3990424 is a wasteful number, since it uses less digits than its factorization.

3990424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498809 (or 498805 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 3990424 is about 1997.6045654734. The cubic root of 3990424 is about 158.6133293719.

The spelling of 3990424 in words is "three million, nine hundred ninety thousand, four hundred twenty-four".