1806899940 has 48 divisors (see below), whose sum is σ = 5621468160. Its totient is φ = 481839840.

The previous prime is 1806899933. The next prime is 1806899951. The reversal of 1806899940 is 499986081.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 1672516 + ... + 1673595.

It is an arithmetic number, because the mean of its divisors is an integer number (117113920).

Almost surely, 2^1806899940 is an apocalyptic number.

1806899940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1806899940 is an abundant number, since it is smaller than the sum of its proper divisors (3814568220).

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

1806899940 is a wasteful number, since it uses less digits than its factorization.

1806899940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346129 (or 3346121 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 1806899940 is about 42507.6456652212. The cubic root of 1806899940 is about 1217.9927442602.

The spelling of 1806899940 in words is "one billion, eight hundred six million, eight hundred ninety-nine thousand, nine hundred forty".