1881400 has 48 divisors (see below), whose sum is σ = 4575600. Its totient is φ = 718080.

The previous prime is 1881391. The next prime is 1881401. The reversal of 1881400 is 41881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881401) 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 11 ways as a sum of consecutive naturals, for example, 4396 + ... + 4804.

It is an arithmetic number, because the mean of its divisors is an integer number (95325).

2^1881400 is an apocalyptic number.

1881400 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 1881400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2287800).

1881400 is an abundant number, since it is smaller than the sum of its proper divisors (2694200).

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

1881400 is a wasteful number, since it uses less digits than its factorization.

1881400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1881400 is about 1371.6413525408. The cubic root of 1881400 is about 123.4507444529.

It can be divided in two parts, 18 and 81400, that added together give a palindrome (81418).

The spelling of 1881400 in words is "one million, eight hundred eighty-one thousand, four hundred".