3998431564 has 12 divisors (see below), whose sum is σ = 7146133344. Its totient is φ = 1956679184.

The previous prime is 3998431559. The next prime is 3998431571. The reversal of 3998431564 is 4651348993.

It is a happy number.

It is a super-4 number, since 4×3998431564⁴ (a number of 40 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10633939 + ... + 10634314.

It is an arithmetic number, because the mean of its divisors is an integer number (595511112).

Almost surely, 2^3998431564 is an apocalyptic number.

It is an amenable number.

3998431564 is a deficient number, since it is larger than the sum of its proper divisors (3147701780).

3998431564 is a wasteful number, since it uses less digits than its factorization.

3998431564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21268304 (or 21268302 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 52.

The square root of 3998431564 is about 63233.1524123224. The cubic root of 3998431564 is about 1587.1935467646.

The spelling of 3998431564 in words is "three billion, nine hundred ninety-eight million, four hundred thirty-one thousand, five hundred sixty-four".