3990793444 has 18 divisors (see below), whose sum is σ = 7676506502. Its totient is φ = 1813996800.

The previous prime is 3990793441. The next prime is 3990793481. The reversal of 3990793444 is 4443970993.

It can be written as a sum of positive squares in only one way, i.e., 3095587044 + 895206400 = 55638^2 + 29920^2 .

It is a super-2 number, since 2×3990793444² = 31852864625346762272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3990793391 and 3990793400.

It is not an unprimeable number, because it can be changed into a prime (3990793441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4122237 + ... + 4123204.

Almost surely, 2^3990793444 is an apocalyptic number.

It is an amenable number.

3990793444 is a deficient number, since it is larger than the sum of its proper divisors (3685713058).

3990793444 is a wasteful number, since it uses less digits than its factorization.

3990793444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8245467 (or 8245454 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 52.

The square root of 3990793444 is about 63172.7270584388. The cubic root of 3990793444 is about 1586.1822416790.

The spelling of 3990793444 in words is "three billion, nine hundred ninety million, seven hundred ninety-three thousand, four hundred forty-four".