1801982856 has 32 divisors (see below), whose sum is σ = 4524305760. Its totient is φ = 598081152.

The previous prime is 1801982801. The next prime is 1801982869. The reversal of 1801982856 is 6582891081.

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 7 ways as a sum of consecutive naturals, for example, 155530 + ... + 166713.

It is an arithmetic number, because the mean of its divisors is an integer number (141384555).

Almost surely, 2^1801982856 is an apocalyptic number.

It is an amenable number.

1801982856 is an abundant number, since it is smaller than the sum of its proper divisors (2722322904).

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

1801982856 is a wasteful number, since it uses less digits than its factorization.

1801982856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322485 (or 322481 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 48.

The square root of 1801982856 is about 42449.7686212775. The cubic root of 1801982856 is about 1216.8869067073.

It can be divided in two parts, 180 and 1982856, that added together give a triangular number (1983036 = T₁₉₉₁).

The spelling of 1801982856 in words is "one billion, eight hundred one million, nine hundred eighty-two thousand, eight hundred fifty-six".