1682640 has 160 divisors (see below), whose sum is σ = 6249600. Its totient is φ = 414720.

The previous prime is 1682627. The next prime is 1682663. The reversal of 1682640 is 462861.

1682640 is a `hidden beast` number, since 16 + 8 + 2 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41020 + ... + 41060.

It is an arithmetic number, because the mean of its divisors is an integer number (39060).

2^1682640 is an apocalyptic number.

1682640 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 1682640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3124800).

1682640 is an abundant number, since it is smaller than the sum of its proper divisors (4566960).

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

1682640 is a wasteful number, since it uses less digits than its factorization.

1682640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1682640 is about 1297.1661420188. The cubic root of 1682640 is about 118.9406761248.

The spelling of 1682640 in words is "one million, six hundred eighty-two thousand, six hundred forty".