3990783 has 16 divisors (see below), whose sum is σ = 5523680. Its totient is φ = 2560896.

The previous prime is 3990773. The next prime is 3990827. The reversal of 3990783 is 3870993.

It is a happy number.

It is not a de Polignac number, because 3990783 - 2¹⁰ = 3989759 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

3990783 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17313 + ... + 17541.

It is an arithmetic number, because the mean of its divisors is an integer number (345230).

Almost surely, 2^3990783 is an apocalyptic number.

3990783 is a deficient number, since it is larger than the sum of its proper divisors (1532897).

3990783 is a wasteful number, since it uses less digits than its factorization.

3990783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 3990783 is about 1997.6944210765. The cubic root of 3990783 is about 158.6180857986.

The spelling of 3990783 in words is "three million, nine hundred ninety thousand, seven hundred eighty-three".