1979335836 has 72 divisors (see below), whose sum is σ = 5085400320. Its totient is φ = 649018656.

The previous prime is 1979335801. The next prime is 1979335843. The reversal of 1979335836 is 6385339791.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 871975 + ... + 874241.

It is an arithmetic number, because the mean of its divisors is an integer number (70630560).

Almost surely, 2^1979335836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1979335836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2542700160).

1979335836 is an abundant number, since it is smaller than the sum of its proper divisors (3106064484).

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

1979335836 is a wasteful number, since it uses less digits than its factorization.

1979335836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663 (or 2658 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 1979335836 is about 44489.7273086721. The cubic root of 1979335836 is about 1255.5668166525.

The spelling of 1979335836 in words is "one billion, nine hundred seventy-nine million, three hundred thirty-five thousand, eight hundred thirty-six".