1640982 has 32 divisors (see below), whose sum is σ = 3801600. Its totient is φ = 462528.

The previous prime is 1640971. The next prime is 1641007. The reversal of 1640982 is 2890461.

1640982 is nontrivially palindromic in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3519 + ... + 3957.

It is an arithmetic number, because the mean of its divisors is an integer number (118800).

2^1640982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1640982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1900800).

1640982 is an abundant number, since it is smaller than the sum of its proper divisors (2160618).

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

1640982 is a wasteful number, since it uses less digits than its factorization.

1640982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1640982 is about 1281.0081966951. The cubic root of 1640982 is about 117.9509036392.

The spelling of 1640982 in words is "one million, six hundred forty thousand, nine hundred eighty-two".