3990424709 has 16 divisors (see below), whose sum is σ = 4096266240. Its totient is φ = 3886444800.

The previous prime is 3990424699. The next prime is 3990424717. The reversal of 3990424709 is 9074240993.

3990424709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3990424709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990424799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1562984 + ... + 1565534.

It is an arithmetic number, because the mean of its divisors is an integer number (256016640).

Almost surely, 2^3990424709 is an apocalyptic number.

It is an amenable number.

3990424709 is a deficient number, since it is larger than the sum of its proper divisors (105841531).

3990424709 is a wasteful number, since it uses less digits than its factorization.

3990424709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 3990424709 is about 63169.8085243259. The cubic root of 3990424709 is about 1586.1333876577.

The spelling of 3990424709 in words is "three billion, nine hundred ninety million, four hundred twenty-four thousand, seven hundred nine".