1980569892 has 96 divisors (see below), whose sum is σ = 5447135232. Its totient is φ = 548263296.

The previous prime is 1980569869. The next prime is 1980569897. The reversal of 1980569892 is 2989650891.

It is not an unprimeable number, because it can be changed into a prime (1980569897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 816193 + ... + 818615.

It is an arithmetic number, because the mean of its divisors is an integer number (56740992).

Almost surely, 2^1980569892 is an apocalyptic number.

1980569892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1980569892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2723567616).

1980569892 is an abundant number, since it is smaller than the sum of its proper divisors (3466565340).

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

1980569892 is a wasteful number, since it uses less digits than its factorization.

1980569892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737 (or 2735 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 57.

The square root of 1980569892 is about 44503.5941469900. The cubic root of 1980569892 is about 1255.8276984152.

The spelling of 1980569892 in words is "one billion, nine hundred eighty million, five hundred sixty-nine thousand, eight hundred ninety-two".