1881134280 has 160 divisors (see below), whose sum is σ = 6339678840. Its totient is φ = 500290560.

The previous prime is 1881134261. The next prime is 1881134341. The reversal of 1881134280 is 824311881.

It can be written as a sum of positive squares in 4 ways, for example, as 1081488996 + 799645284 = 32886^2 + 28278^2 .

It is a super-2 number, since 2×1881134280² = 7077332358782236800, which contains 22 as substring.

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 39 ways as a sum of consecutive naturals, for example, 1998610 + ... + 1999550.

Almost surely, 2^1881134280 is an apocalyptic number.

1881134280 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 1881134280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3169839420).

1881134280 is an abundant number, since it is smaller than the sum of its proper divisors (4458544560).

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

1881134280 is a wasteful number, since it uses less digits than its factorization.

1881134280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581 (or 1568 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 1881134280 is about 43372.0449137460. The cubic root of 1881134280 is about 1234.4493231369.

It can be divided in two parts, 1881 and 134280, that added together give a square (136161 = 369²).

The spelling of 1881134280 in words is "one billion, eight hundred eighty-one million, one hundred thirty-four thousand, two hundred eighty".