1623680 has 64 divisors (see below), whose sum is σ = 4039200. Its totient is φ = 623616.

The previous prime is 1623679. The next prime is 1623701. The reversal of 1623680 is 863261.

It is a tau number, because it is divible by the number of its divisors (64).

It is a zygodrome in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27491 + ... + 27549.

2^1623680 is an apocalyptic number.

1623680 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 1623680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2019600).

1623680 is an abundant number, since it is smaller than the sum of its proper divisors (2415520).

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

1623680 is an equidigital number, since it uses as much as digits as its factorization.

1623680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1623680 is about 1274.2370266163. The cubic root of 1623680 is about 117.5348923084.

The spelling of 1623680 in words is "one million, six hundred twenty-three thousand, six hundred eighty".