1980721272 has 64 divisors (see below), whose sum is σ = 5519059200. Its totient is φ = 588695040.

The previous prime is 1980721261. The next prime is 1980721277. The reversal of 1980721272 is 2721270891.

1980721272 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1980721272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980721277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120004 + ... + 135507.

It is an arithmetic number, because the mean of its divisors is an integer number (86235300).

Almost surely, 2^1980721272 is an apocalyptic number.

1980721272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1980721272 is an abundant number, since it is smaller than the sum of its proper divisors (3538337928).

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

1980721272 is a wasteful number, since it uses less digits than its factorization.

1980721272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255556 (or 255552 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 1980721272 is about 44505.2948760032. The cubic root of 1980721272 is about 1255.8596929696.

The spelling of 1980721272 in words is "one billion, nine hundred eighty million, seven hundred twenty-one thousand, two hundred seventy-two".