3990476431 has 4 divisors (see below), whose sum is σ = 3990620200. Its totient is φ = 3990332664.

The previous prime is 3990476423. The next prime is 3990476447. The reversal of 3990476431 is 1346740993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3990476431 - 2³ = 3990476423 is a prime.

It is a super-2 number, since 2×3990476431² = 31847804292732995522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990476401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15516 + ... + 90673.

It is an arithmetic number, because the mean of its divisors is an integer number (997655050).

Almost surely, 2^3990476431 is an apocalyptic number.

3990476431 is a deficient number, since it is larger than the sum of its proper divisors (143769).

3990476431 is a wasteful number, since it uses less digits than its factorization.

3990476431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143768.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 3990476431 is about 63170.2179116077. The cubic root of 3990476431 is about 1586.1402405320.

The spelling of 3990476431 in words is "three billion, nine hundred ninety million, four hundred seventy-six thousand, four hundred thirty-one".