1812919264 has 48 divisors (see below), whose sum is σ = 3847813200. Its totient is φ = 835845120.

The previous prime is 1812919261. The next prime is 1812919267. The reversal of 1812919264 is 4629192181.

It is an interprime number because it is at equal distance from previous prime (1812919261) and next prime (1812919267).

It is a self number, because there is not a number n which added to its sum of digits gives 1812919264.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812919261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547887 + ... + 551185.

It is an arithmetic number, because the mean of its divisors is an integer number (80162775).

Almost surely, 2^1812919264 is an apocalyptic number.

It is an amenable number.

1812919264 is an abundant number, since it is smaller than the sum of its proper divisors (2034893936).

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

1812919264 is a wasteful number, since it uses less digits than its factorization.

1812919264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643 (or 4635 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 1812919264 is about 42578.3896360583. The cubic root of 1812919264 is about 1219.3437445189.

The spelling of 1812919264 in words is "one billion, eight hundred twelve million, nine hundred nineteen thousand, two hundred sixty-four".