3990499646 has 12 divisors (see below), whose sum is σ = 6841261752. Its totient is φ = 1710112836.

The previous prime is 3990499637. The next prime is 3990499649. The reversal of 3990499646 is 6469940993.

It is a super-2 number, since 2×3990499646² = 31848174849452250632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990499649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227921 + ... + 244803.

It is an arithmetic number, because the mean of its divisors is an integer number (570105146).

Almost surely, 2^3990499646 is an apocalyptic number.

3990499646 is a deficient number, since it is larger than the sum of its proper divisors (2850762106).

3990499646 is an frugal number, since it uses more digits than its factorization.

3990499646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33775 (or 16892 counting only the distinct ones).

The product of its (nonzero) digits is 11337408, while the sum is 59.

The square root of 3990499646 is about 63170.4016609045. The cubic root of 3990499646 is about 1586.1433163698.

The spelling of 3990499646 in words is "three billion, nine hundred ninety million, four hundred ninety-nine thousand, six hundred forty-six".