3990408250 has 32 divisors (see below), whose sum is σ = 7538628240. Its totient is φ = 1581508800.

The previous prime is 3990408217. The next prime is 3990408251. The reversal of 3990408250 is 528040993.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 788093329 + 3202314921 = 28073^2 + 56589^2 .

It is not an unprimeable number, because it can be changed into a prime (3990408251) 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, 45969 + ... + 100468.

Almost surely, 2^3990408250 is an apocalyptic number.

3990408250 is a deficient number, since it is larger than the sum of its proper divisors (3548219990).

3990408250 is a wasteful number, since it uses less digits than its factorization.

3990408250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146563 (or 146553 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 3990408250 is about 63169.6782483495. The cubic root of 3990408250 is about 1586.1312069203.

The spelling of 3990408250 in words is "three billion, nine hundred ninety million, four hundred eight thousand, two hundred fifty".