1812797910 has 96 divisors (see below), whose sum is σ = 5876312832. Its totient is φ = 376683840.

The previous prime is 1812797897. The next prime is 1812797947. The reversal of 1812797910 is 197972181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123864 + ... + 137723.

It is an arithmetic number, because the mean of its divisors is an integer number (61211592).

Almost surely, 2^1812797910 is an apocalyptic number.

1812797910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1812797910 is an abundant number, since it is smaller than the sum of its proper divisors (4063514922).

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

1812797910 is a wasteful number, since it uses less digits than its factorization.

1812797910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261618 (or 261615 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 45.

The square root of 1812797910 is about 42576.9645465714. The cubic root of 1812797910 is about 1219.3165369196.

It can be divided in two parts, 18 and 12797910, that multiplied together give a triangular number (230362380 = T₂₁₄₆₄).

The spelling of 1812797910 in words is "one billion, eight hundred twelve million, seven hundred ninety-seven thousand, nine hundred ten".