1082640 has 80 divisors (see below), whose sum is σ = 3624768. Its totient is φ = 265728.

The previous prime is 1082629. The next prime is 1082647. The reversal of 1082640 is 462801.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1082647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2947 + ... + 3293.

2^1082640 is an apocalyptic number.

1082640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 1040×1041.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1082640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1812384).

1082640 is an abundant number, since it is smaller than the sum of its proper divisors (2542128).

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

1082640 is a wasteful number, since it uses less digits than its factorization.

1082640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1082640 is about 1040.4998798654. The cubic root of 1082640 is about 102.6820875995.

The spelling of 1082640 in words is "one million, eighty-two thousand, six hundred forty".