1816086804 has 72 divisors (see below), whose sum is σ = 5188851360. Its totient is φ = 491569344.

The previous prime is 1816086787. The next prime is 1816086887. The reversal of 1816086804 is 4086806181.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70107 + ... + 92450.

It is an arithmetic number, because the mean of its divisors is an integer number (72067380).

Almost surely, 2^1816086804 is an apocalyptic number.

1816086804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1816086804 is an abundant number, since it is smaller than the sum of its proper divisors (3372764556).

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

1816086804 is a wasteful number, since it uses less digits than its factorization.

1816086804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162597 (or 162588 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 1816086804 is about 42615.5699715491. The cubic root of 1816086804 is about 1220.0534787988.

The spelling of 1816086804 in words is "one billion, eight hundred sixteen million, eighty-six thousand, eight hundred four".