1982990 has 16 divisors (see below), whose sum is σ = 3630960. Its totient is φ = 779520.

The previous prime is 1982989. The next prime is 1982993. The reversal of 1982990 is 992891.

It is a super-3 number, since 3×1982990³ = 23392833356774697000, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091 + ... + 2270.

It is an arithmetic number, because the mean of its divisors is an integer number (226935).

2^1982990 is an apocalyptic number.

1982990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1982990 is a deficient number, since it is larger than the sum of its proper divisors (1647970).

1982990 is a wasteful number, since it uses less digits than its factorization.

1982990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1982990 is about 1408.1867773843. The cubic root of 1982990 is about 125.6338999330.

Subtracting from 1982990 its reverse (992891), we obtain a palindrome (990099).

The spelling of 1982990 in words is "one million, nine hundred eighty-two thousand, nine hundred ninety".