1982540 has 72 divisors (see below), whose sum is σ = 5157600. Its totient is φ = 639744.

The previous prime is 1982537. The next prime is 1982551. The reversal of 1982540 is 452891.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116612 + ... + 116628.

2^1982540 is an apocalyptic number.

1982540 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 1982540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2578800).

1982540 is an abundant number, since it is smaller than the sum of its proper divisors (3175060).

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

1982540 is a wasteful number, since it uses less digits than its factorization.

1982540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 31 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1982540 is about 1408.0269883777. The cubic root of 1982540 is about 125.6243958454.

The spelling of 1982540 in words is "one million, nine hundred eighty-two thousand, five hundred forty".