3999355412 has 24 divisors (see below), whose sum is σ = 7582396416. Its totient is φ = 1834799328.

The previous prime is 3999355397. The next prime is 3999355421. The reversal of 3999355412 is 2145539993.

It is a super-2 number, since 2×3999355412² = 31989687422987379488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221588 + ... + 238955.

It is an arithmetic number, because the mean of its divisors is an integer number (315933184).

Almost surely, 2^3999355412 is an apocalyptic number.

It is an amenable number.

3999355412 is a deficient number, since it is larger than the sum of its proper divisors (3583041004).

3999355412 is a wasteful number, since it uses less digits than its factorization.

3999355412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460727 (or 460725 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 50.

The square root of 3999355412 is about 63240.4570824721. The cubic root of 3999355412 is about 1587.3157790818.

The spelling of 3999355412 in words is "three billion, nine hundred ninety-nine million, three hundred fifty-five thousand, four hundred twelve".