1851808104 has 48 divisors (see below), whose sum is σ = 5043058020. Its totient is φ = 613854720.

The previous prime is 1851808099. The next prime is 1851808121. The reversal of 1851808104 is 4018081581.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1490732100 + 361076004 = 38610^2 + 19002^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58017 + ... + 84080.

Almost surely, 2^1851808104 is an apocalyptic number.

It is an amenable number.

1851808104 is an abundant number, since it is smaller than the sum of its proper divisors (3191249916).

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

1851808104 is a wasteful number, since it uses less digits than its factorization.

1851808104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142290 (or 142283 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 36.

The square root of 1851808104 is about 43032.6399840865. The cubic root of 1851808104 is about 1228.0008293628. Note that the first 3 decimals are identical.

Adding to 1851808104 its reverse (4018081581), we get a palindrome (5869889685).

The spelling of 1851808104 in words is "one billion, eight hundred fifty-one million, eight hundred eight thousand, one hundred four".