1982427900 has 144 divisors (see below), whose sum is σ = 5988554208. Its totient is φ = 505856000.

The previous prime is 1982427893. The next prime is 1982427911. The reversal of 1982427900 is 97242891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 650380 + ... + 653420.

It is an arithmetic number, because the mean of its divisors is an integer number (41587182).

Almost surely, 2^1982427900 is an apocalyptic number.

1982427900 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 1982427900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2994277104).

1982427900 is an abundant number, since it is smaller than the sum of its proper divisors (4006126308).

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

1982427900 is a wasteful number, since it uses less digits than its factorization.

1982427900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152 (or 3145 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 1982427900 is about 44524.4640619065. The cubic root of 1982427900 is about 1256.2202804781.

The spelling of 1982427900 in words is "one billion, nine hundred eighty-two million, four hundred twenty-seven thousand, nine hundred".