1881492228 has 72 divisors (see below), whose sum is σ = 5929560000. Its totient is φ = 488698560.

The previous prime is 1881492227. The next prime is 1881492257. The reversal of 1881492228 is 8222941881.

It is not an unprimeable number, because it can be changed into a prime (1881492227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 336603 + ... + 342146.

It is an arithmetic number, because the mean of its divisors is an integer number (82355000).

Almost surely, 2^1881492228 is an apocalyptic number.

1881492228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1881492228 is an abundant number, since it is smaller than the sum of its proper divisors (4048067772).

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

1881492228 is a wasteful number, since it uses less digits than its factorization.

1881492228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678777 (or 678772 counting only the distinct ones).

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

The square root of 1881492228 is about 43376.1712003261. The cubic root of 1881492228 is about 1234.5276164388.

The spelling of 1881492228 in words is "one billion, eight hundred eighty-one million, four hundred ninety-two thousand, two hundred twenty-eight".