3999768 has 16 divisors (see below), whose sum is σ = 9999480. Its totient is φ = 1333248.

The previous prime is 3999763. The next prime is 3999773. The reversal of 3999768 is 8679993.

It is an interprime number because it is at equal distance from previous prime (3999763) and next prime (3999773).

It is a self number, because there is not a number n which added to its sum of digits gives 3999768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999763) 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, 83305 + ... + 83352.

Almost surely, 2^3999768 is an apocalyptic number.

It is an amenable number.

3999768 is an abundant number, since it is smaller than the sum of its proper divisors (5999712).

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

3999768 is a wasteful number, since it uses less digits than its factorization.

3999768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166666 (or 166662 counting only the distinct ones).

The product of its digits is 734832, while the sum is 51.

The square root of 3999768 is about 1999.9419991590. The cubic root of 3999768 is about 158.7370361621.

The spelling of 3999768 in words is "three million, nine hundred ninety-nine thousand, seven hundred sixty-eight".