1881411912 has 24 divisors (see below), whose sum is σ = 5095490790. Its totient is φ = 627137280.

The previous prime is 1881411911. The next prime is 1881411953. The reversal of 1881411912 is 2191141881.

It can be written as a sum of positive squares in only one way, i.e., 1037741796 + 843670116 = 32214^2 + 29046^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is not an unprimeable number, because it can be changed into a prime (1881411911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13065289 + ... + 13065432.

Almost surely, 2^1881411912 is an apocalyptic number.

1881411912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1881411912 is an abundant number, since it is smaller than the sum of its proper divisors (3214078878).

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

1881411912 is a wasteful number, since it uses less digits than its factorization.

1881411912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26130733 (or 26130726 counting only the distinct ones).

The product of its digits is 4608, while the sum is 36.

The square root of 1881411912 is about 43375.2453825912. The cubic root of 1881411912 is about 1234.5100499333.

The spelling of 1881411912 in words is "one billion, eight hundred eighty-one million, four hundred eleven thousand, nine hundred twelve".