1638080 has 28 divisors (see below), whose sum is σ = 3901440. Its totient is φ = 655104.

The previous prime is 1638067. The next prime is 1638089. The reversal of 1638080 is 808361.

It is a plaindrome in base 15.

It is a zygodrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1638089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2240 + ... + 2879.

2^1638080 is an apocalyptic number.

1638080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1638080 is an abundant number, since it is smaller than the sum of its proper divisors (2263360).

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

1638080 is an equidigital number, since it uses as much as digits as its factorization.

1638080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5136 (or 5126 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1638080 is about 1279.8749938959. The cubic root of 1638080 is about 117.8813323911.

The spelling of 1638080 in words is "one million, six hundred thirty-eight thousand, eighty".