1816318338 has 32 divisors (see below), whose sum is σ = 3837408000. Its totient is φ = 571537296.

The previous prime is 1816318331. The next prime is 1816318351. The reversal of 1816318338 is 8338136181.

It is a self number, because there is not a number n which added to its sum of digits gives 1816318338.

It is not an unprimeable number, because it can be changed into a prime (1816318331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4113 + ... + 60411.

It is an arithmetic number, because the mean of its divisors is an integer number (119919000).

Almost surely, 2^1816318338 is an apocalyptic number.

1816318338 is an abundant number, since it is smaller than the sum of its proper divisors (2021089662).

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

1816318338 is a wasteful number, since it uses less digits than its factorization.

1816318338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56606.

The product of its digits is 82944, while the sum is 42.

The square root of 1816318338 is about 42618.2864273072. The cubic root of 1816318338 is about 1220.1053250464.

The spelling of 1816318338 in words is "one billion, eight hundred sixteen million, three hundred eighteen thousand, three hundred thirty-eight".