1806812860 has 24 divisors (see below), whose sum is σ = 3896857440. Its totient is φ = 703191744.

The previous prime is 1806812851. The next prime is 1806812911. The reversal of 1806812860 is 682186081.

It is a super-2 number, since 2×1806812860² = 6529145422122759200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1220080 + ... + 1221559.

It is an arithmetic number, because the mean of its divisors is an integer number (162369060).

Almost surely, 2^1806812860 is an apocalyptic number.

1806812860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1806812860 is an abundant number, since it is smaller than the sum of its proper divisors (2090044580).

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

1806812860 is a wasteful number, since it uses less digits than its factorization.

1806812860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441685 (or 2441683 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 1806812860 is about 42506.6213665589. The cubic root of 1806812860 is about 1217.9731776884.

The spelling of 1806812860 in words is "one billion, eight hundred six million, eight hundred twelve thousand, eight hundred sixty".