1801400 has 24 divisors (see below), whose sum is σ = 4188720. Its totient is φ = 720480.

The previous prime is 1801363. The next prime is 1801403. The reversal of 1801400 is 41081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4304 + ... + 4703.

It is an arithmetic number, because the mean of its divisors is an integer number (174530).

2^1801400 is an apocalyptic number.

1801400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1801400 is an abundant number, since it is smaller than the sum of its proper divisors (2387320).

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

1801400 is a wasteful number, since it uses less digits than its factorization.

1801400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9023 (or 9014 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1801400 is about 1342.1624342828. The cubic root of 1801400 is about 121.6755690823.

Adding to 1801400 its reverse (41081), we get a palindrome (1842481).

The spelling of 1801400 in words is "one million, eight hundred one thousand, four hundred".