1630680 has 64 divisors (see below), whose sum is σ = 4976640. Its totient is φ = 427392.

The previous prime is 1630669. The next prime is 1630721. The reversal of 1630680 is 860361.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1630680.

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, 12777 + ... + 12903.

It is an arithmetic number, because the mean of its divisors is an integer number (77760).

2^1630680 is an apocalyptic number.

1630680 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 1630680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2488320).

1630680 is an abundant number, since it is smaller than the sum of its proper divisors (3345960).

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

1630680 is a wasteful number, since it uses less digits than its factorization.

1630680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1630680 is about 1276.9808142646. The cubic root of 1630680 is about 117.7035554138.

The spelling of 1630680 in words is "one million, six hundred thirty thousand, six hundred eighty".