1979335940 has 12 divisors (see below), whose sum is σ = 4156605516. Its totient is φ = 791734368.

The previous prime is 1979335931. The next prime is 1979335987. The reversal of 1979335940 is 495339791.

It can be written as a sum of positive squares in 2 ways, for example, as 563017984 + 1416317956 = 23728^2 + 37634^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49483379 + ... + 49483418.

It is an arithmetic number, because the mean of its divisors is an integer number (346383793).

Almost surely, 2^1979335940 is an apocalyptic number.

1979335940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1979335940 is an abundant number, since it is smaller than the sum of its proper divisors (2177269576).

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

1979335940 is a wasteful number, since it uses less digits than its factorization.

1979335940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98966806 (or 98966804 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 50.

The square root of 1979335940 is about 44489.7284774812. The cubic root of 1979335940 is about 1255.5668386429.

The spelling of 1979335940 in words is "one billion, nine hundred seventy-nine million, three hundred thirty-five thousand, nine hundred forty".