1881429228 has 96 divisors (see below), whose sum is σ = 5593118720. Its totient is φ = 535766400.

The previous prime is 1881429167. The next prime is 1881429239. The reversal of 1881429228 is 8229241881.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232653 + ... + 240603.

Almost surely, 2^1881429228 is an apocalyptic number.

1881429228 is a gapful number since it is divisible by the number (18) 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 1881429228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2796559360).

1881429228 is an abundant number, since it is smaller than the sum of its proper divisors (3711689492).

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

1881429228 is a wasteful number, since it uses less digits than its factorization.

1881429228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8284 (or 8276 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 1881429228 is about 43375.4449890719. Note that the first 3 decimals coincide. The cubic root of 1881429228 is about 1234.5138372858.

The spelling of 1881429228 in words is "one billion, eight hundred eighty-one million, four hundred twenty-nine thousand, two hundred twenty-eight".