1982797800 has 144 divisors (see below), whose sum is σ = 6426567840. Its totient is φ = 505676160.

The previous prime is 1982797783. The next prime is 1982797813. The reversal of 1982797800 is 87972891.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 314277 + ... + 320523.

Almost surely, 2^1982797800 is an apocalyptic number.

1982797800 is a gapful number since it is divisible by the number (10) 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 1982797800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3213283920).

1982797800 is an abundant number, since it is smaller than the sum of its proper divisors (4443770040).

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

1982797800 is a wasteful number, since it uses less digits than its factorization.

1982797800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6312 (or 6280 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 51.

The square root of 1982797800 is about 44528.6177643097. The cubic root of 1982797800 is about 1256.2984080750.

The spelling of 1982797800 in words is "one billion, nine hundred eighty-two million, seven hundred ninety-seven thousand, eight hundred".