1881893820 has 48 divisors (see below), whose sum is σ = 5277605760. Its totient is φ = 501047616.

The previous prime is 1881893813. The next prime is 1881893831. The reversal of 1881893820 is 283981881.

It is a self number, because there is not a number n which added to its sum of digits gives 1881893820.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14191 + ... + 62969.

It is an arithmetic number, because the mean of its divisors is an integer number (109950120).

Almost surely, 2^1881893820 is an apocalyptic number.

1881893820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1881893820 is an abundant number, since it is smaller than the sum of its proper divisors (3395711940).

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

1881893820 is a wasteful number, since it uses less digits than its factorization.

1881893820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49434 (or 49432 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 48.

The square root of 1881893820 is about 43380.8001309335. The cubic root of 1881893820 is about 1234.6154440928.

The spelling of 1881893820 in words is "one billion, eight hundred eighty-one million, eight hundred ninety-three thousand, eight hundred twenty".