1982491000 has 96 divisors (see below), whose sum is σ = 5396554800. Its totient is φ = 679694400.

The previous prime is 1982490997. The next prime is 1982491001. The reversal of 1982491000 is 1942891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982491001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28771 + ... + 69229.

Almost surely, 2^1982491000 is an apocalyptic number.

1982491000 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 1982491000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2698277400).

1982491000 is an abundant number, since it is smaller than the sum of its proper divisors (3414063800).

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

1982491000 is a wasteful number, since it uses less digits than its factorization.

1982491000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40494 (or 40473 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1982491000 is about 44525.1726554766. The cubic root of 1982491000 is about 1256.2336086902.

The spelling of 1982491000 in words is "one billion, nine hundred eighty-two million, four hundred ninety-one thousand".