1812799680 has 112 divisors (see below), whose sum is σ = 5825240064. Its totient is φ = 477568000.

The previous prime is 1812799673. The next prime is 1812799693. The reversal of 1812799680 is 869972181.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68305 + ... + 91055.

It is an arithmetic number, because the mean of its divisors is an integer number (52011072).

Almost surely, 2^1812799680 is an apocalyptic number.

1812799680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1812799680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2912620032).

1812799680 is an abundant number, since it is smaller than the sum of its proper divisors (4012440384).

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

1812799680 is a wasteful number, since it uses less digits than its factorization.

1812799680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22854 (or 22844 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 51.

The square root of 1812799680 is about 42576.9853324540. The cubic root of 1812799680 is about 1219.3169337628.

The spelling of 1812799680 in words is "one billion, eight hundred twelve million, seven hundred ninety-nine thousand, six hundred eighty".