1680490 has 16 divisors (see below), whose sum is σ = 3457152. Its totient is φ = 576144.

The previous prime is 1680461. The next prime is 1680491. The reversal of 1680490 is 940861.

It is not an unprimeable number, because it can be changed into a prime (1680491) 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, 11934 + ... + 12073.

It is an arithmetic number, because the mean of its divisors is an integer number (216072).

2^1680490 is an apocalyptic number.

1680490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1680490 is an abundant number, since it is smaller than the sum of its proper divisors (1776662).

1680490 is a wasteful number, since it uses less digits than its factorization.

1680490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24021.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1680490 is about 1296.3371475045. The cubic root of 1680490 is about 118.8899955578.

The spelling of 1680490 in words is "one million, six hundred eighty thousand, four hundred ninety".