1812278808 has 48 divisors (see below), whose sum is σ = 4910232600. Its totient is φ = 603849600.

The previous prime is 1812278807. The next prime is 1812278821. The reversal of 1812278808 is 8088722181.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812278807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 309508 + ... + 315308.

Almost surely, 2^1812278808 is an apocalyptic number.

1812278808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1812278808 is an abundant number, since it is smaller than the sum of its proper divisors (3097953792).

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

1812278808 is a wasteful number, since it uses less digits than its factorization.

1812278808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10152 (or 10145 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 45.

The square root of 1812278808 is about 42570.8680672593. The cubic root of 1812278808 is about 1219.2001404044.

The spelling of 1812278808 in words is "one billion, eight hundred twelve million, two hundred seventy-eight thousand, eight hundred eight".