1881140 has 12 divisors (see below), whose sum is σ = 3950436. Its totient is φ = 752448.

The previous prime is 1881127. The next prime is 1881151. The reversal of 1881140 is 411881.

It can be written as a sum of positive squares in 2 ways, for example, as 258064 + 1623076 = 508^2 + 1274^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47009 + ... + 47048.

It is an arithmetic number, because the mean of its divisors is an integer number (329203).

2^1881140 is an apocalyptic number.

1881140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1881140 is an abundant number, since it is smaller than the sum of its proper divisors (2069296).

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

1881140 is a wasteful number, since it uses less digits than its factorization.

1881140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94066 (or 94064 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 1881140 is about 1371.5465723044. The cubic root of 1881140 is about 123.4450574340.

The spelling of 1881140 in words is "one million, eight hundred eighty-one thousand, one hundred forty".