1983599980 has 12 divisors (see below), whose sum is σ = 4165560000. Its totient is φ = 793439984.

The previous prime is 1983599963. The next prime is 1983599999. The reversal of 1983599980 is 899953891.

It is a happy number.

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, 49589980 + ... + 49590019.

It is an arithmetic number, because the mean of its divisors is an integer number (347130000).

Almost surely, 2^1983599980 is an apocalyptic number.

1983599980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1983599980 is an abundant number, since it is smaller than the sum of its proper divisors (2181960020).

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

1983599980 is a wasteful number, since it uses less digits than its factorization.

1983599980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99180008 (or 99180006 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 61.

The square root of 1983599980 is about 44537.6243192203. The cubic root of 1983599980 is about 1256.4678053415.

The spelling of 1983599980 in words is "one billion, nine hundred eighty-three million, five hundred ninety-nine thousand, nine hundred eighty".