3979889792 has 16 divisors (see below), whose sum is σ = 7928686950. Its totient is φ = 1989944832.

The previous prime is 3979889779. The next prime is 3979889827. The reversal of 3979889792 is 2979889793.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3133312576 + 846577216 = 55976^2 + 29096^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-4 number, since 4×3979889792⁴ (a number of 40 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15546317 + ... + 15546572.

Almost surely, 2^3979889792 is an apocalyptic number.

3979889792 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3979889792 is a deficient number, since it is larger than the sum of its proper divisors (3948797158).

3979889792 is an equidigital number, since it uses as much as digits as its factorization.

3979889792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31092903 (or 31092891 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 71.

The square root of 3979889792 is about 63086.3677191832. The cubic root of 3979889792 is about 1584.7363341861.

Subtracting from 3979889792 its reverse (2979889793), we obtain a palindrome (999999999).

The spelling of 3979889792 in words is "three billion, nine hundred seventy-nine million, eight hundred eighty-nine thousand, seven hundred ninety-two".