3999366790 has 64 divisors (see below), whose sum is σ = 7928331840. Its totient is φ = 1446359040.

The previous prime is 3999366751. The next prime is 3999366809. The reversal of 3999366790 is 976639993.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 441426 + ... + 450394.

It is an arithmetic number, because the mean of its divisors is an integer number (123880185).

Almost surely, 2^3999366790 is an apocalyptic number.

3999366790 is a deficient number, since it is larger than the sum of its proper divisors (3928965050).

3999366790 is a wasteful number, since it uses less digits than its factorization.

3999366790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9097.

The product of its (nonzero) digits is 14880348, while the sum is 61.

The square root of 3999366790 is about 63240.5470406447. The cubic root of 3999366790 is about 1587.3172843628.

The spelling of 3999366790 in words is "three billion, nine hundred ninety-nine million, three hundred sixty-six thousand, seven hundred ninety".