1881171360 has 144 divisors (see below), whose sum is σ = 6443728200. Its totient is φ = 499752960.

The previous prime is 1881171349. The next prime is 1881171421. The reversal of 1881171360 is 631711881.

It is a happy number.

1881171360 is a `hidden beast` number, since 188 + 117 + 1 + 360 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1875582864 + 5588496 = 43308^2 + 2364^2 .

It is a tau number, because it is divible by the number of its divisors (144).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 402316 + ... + 406964.

Almost surely, 2^1881171360 is an apocalyptic number.

1881171360 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 1881171360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3221864100).

1881171360 is an abundant number, since it is smaller than the sum of its proper divisors (4562556840).

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

1881171360 is a wasteful number, since it uses less digits than its factorization.

1881171360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4951 (or 4940 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 1881171360 is about 43372.4723759207. The cubic root of 1881171360 is about 1234.4574340376.

The spelling of 1881171360 in words is "one billion, eight hundred eighty-one million, one hundred seventy-one thousand, three hundred sixty".