3999999996 has 60 divisors (see below), whose sum is σ = 10739438248. Its totient is φ = 1297293408.

The previous prime is 3999999979. The next prime is 4000000007. The reversal of 3999999996 is 6999999993.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 154846 + ... + 178821.

Almost surely, 2^3999999996 is an apocalyptic number.

3999999996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3999999996 is an abundant number, since it is smaller than the sum of its proper divisors (6739438252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3999999996 is a wasteful number, since it uses less digits than its factorization.

3999999996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333720 (or 333709 counting only the distinct ones).

The product of its digits is 774840978, while the sum is 81.

The square root of 3999999996 is about 63245.5531717448. The cubic root of 3999999996 is about 1587.4010514391.

It can be divided in two parts, 3 and 999999996, that added together give a palindrome (999999999).

The spelling of 3999999996 in words is "three billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-six".