1980398432 has 24 divisors (see below), whose sum is σ = 3900229200. Its totient is φ = 989864064.

The previous prime is 1980398423. The next prime is 1980398447. The reversal of 1980398432 is 2348930891.

It is a happy number.

It is a congruent 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, 105194 + ... + 122582.

It is an arithmetic number, because the mean of its divisors is an integer number (162509550).

Almost surely, 2^1980398432 is an apocalyptic number.

It is an amenable number.

1980398432 is a deficient number, since it is larger than the sum of its proper divisors (1919830768).

1980398432 is a wasteful number, since it uses less digits than its factorization.

1980398432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20958 (or 20950 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 1980398432 is about 44501.6677440295. The cubic root of 1980398432 is about 1255.7914579318.

The spelling of 1980398432 in words is "one billion, nine hundred eighty million, three hundred ninety-eight thousand, four hundred thirty-two".