1809318912 has 88 divisors (see below), whose sum is σ = 4935005856. Its totient is φ = 589037568.

The previous prime is 1809318911. The next prime is 1809318913. The reversal of 1809318912 is 2198139081.

It is an interprime number because it is at equal distance from previous prime (1809318911) and next prime (1809318913).

It is not an unprimeable number, because it can be changed into a prime (1809318911) 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, 125248 + ... + 138944.

It is an arithmetic number, because the mean of its divisors is an integer number (56079612).

Almost surely, 2^1809318912 is an apocalyptic number.

1809318912 is a gapful number since it is divisible by the number (12) 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 1809318912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2467502928).

1809318912 is an abundant number, since it is smaller than the sum of its proper divisors (3125686944).

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

1809318912 is a wasteful number, since it uses less digits than its factorization.

1809318912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13763 (or 13745 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 1809318912 is about 42536.0895240736. The cubic root of 1809318912 is about 1218.5360277191.

The spelling of 1809318912 in words is "one billion, eight hundred nine million, three hundred eighteen thousand, nine hundred twelve".