1800880 has 20 divisors (see below), whose sum is σ = 4187232. Its totient is φ = 720320.

The previous prime is 1800863. The next prime is 1800889. The reversal of 1800880 is 880081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1800889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11176 + ... + 11335.

2^1800880 is an apocalyptic number.

1800880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1800880 is an abundant number, since it is smaller than the sum of its proper divisors (2386352).

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

1800880 is a wasteful number, since it uses less digits than its factorization.

1800880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22524 (or 22518 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 1800880 is about 1341.9687030628. The cubic root of 1800880 is about 121.6638601550.

The spelling of 1800880 in words is "one million, eight hundred thousand, eight hundred eighty".