1980453720 has 64 divisors (see below), whose sum is σ = 6790129920. Its totient is φ = 452674944.

The previous prime is 1980453613. The next prime is 1980453731. The reversal of 1980453720 is 273540891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1178002 + ... + 1179681.

It is an arithmetic number, because the mean of its divisors is an integer number (106095780).

Almost surely, 2^1980453720 is an apocalyptic number.

1980453720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1980453720 is an abundant number, since it is smaller than the sum of its proper divisors (4809676200).

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

1980453720 is a wasteful number, since it uses less digits than its factorization.

1980453720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357704 (or 2357700 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1980453720 is about 44502.2889298966. The cubic root of 1980453720 is about 1255.8031440570.

The spelling of 1980453720 in words is "one billion, nine hundred eighty million, four hundred fifty-three thousand, seven hundred twenty".