1881900 has 144 divisors (see below), whose sum is σ = 6562080. Its totient is φ = 460800.

The previous prime is 1881899. The next prime is 1881907. The reversal of 1881900 is 91881.

It is a super-2 number, since 2×1881900² = 7083095220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1881907) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45880 + ... + 45920.

It is an arithmetic number, because the mean of its divisors is an integer number (45570).

2^1881900 is an apocalyptic number.

1881900 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 1881900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3281040).

1881900 is an abundant number, since it is smaller than the sum of its proper divisors (4680180).

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

1881900 is a wasteful number, since it uses less digits than its factorization.

1881900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1881900 is about 1371.8236038208. The cubic root of 1881900 is about 123.4616795553.

It can be divided in two parts, 18 and 81900, that added together give a palindrome (81918).

The spelling of 1881900 in words is "one million, eight hundred eighty-one thousand, nine hundred".