1982402500 has 120 divisors (see below), whose sum is σ = 4708311608. Its totient is φ = 725760000.

The previous prime is 1982402497. The next prime is 1982402501. The reversal of 1982402500 is 52042891.

It can be written as a sum of positive squares in 20 ways, for example, as 1447498116 + 534904384 = 38046^2 + 23128^2 .

It is not an unprimeable number, because it can be changed into a prime (1982402501) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5882332 + ... + 5882668.

Almost surely, 2^1982402500 is an apocalyptic number.

1982402500 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 1982402500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2354155804).

1982402500 is an abundant number, since it is smaller than the sum of its proper divisors (2725909108).

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

1982402500 is a wasteful number, since it uses less digits than its factorization.

1982402500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1982402500 is about 44524.1788245443. The cubic root of 1982402500 is about 1256.2149153176.

The spelling of 1982402500 in words is "one billion, nine hundred eighty-two million, four hundred two thousand, five hundred".