1881144 has 40 divisors (see below), whose sum is σ = 5270760. Its totient is φ = 626832.

The previous prime is 1881127. The next prime is 1881151. The reversal of 1881144 is 4411881.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 804 + ... + 2099.

It is an arithmetic number, because the mean of its divisors is an integer number (131769).

2^1881144 is an apocalyptic number.

It is an amenable number.

1881144 is an abundant number, since it is smaller than the sum of its proper divisors (3389616).

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

1881144 is a wasteful number, since it uses less digits than its factorization.

1881144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921 (or 2908 counting only the distinct ones).

The product of its digits is 1024, while the sum is 27.

The square root of 1881144 is about 1371.5480305115. The cubic root of 1881144 is about 123.4451449306.

It can be divided in two parts, 1881 and 144, that added together give a square (2025 = 45²).

The spelling of 1881144 in words is "one million, eight hundred eighty-one thousand, one hundred forty-four".