1816338450 has 48 divisors (see below), whose sum is σ = 4508657856. Its totient is φ = 483912000.

The previous prime is 1816338413. The next prime is 1816338479. The reversal of 1816338450 is 548336181.

It is a junction number, because it is equal to n+sod(n) for n = 1816338399 and 1816338408.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178500 + ... + 188400.

It is an arithmetic number, because the mean of its divisors is an integer number (93930372).

Almost surely, 2^1816338450 is an apocalyptic number.

1816338450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1816338450 is an abundant number, since it is smaller than the sum of its proper divisors (2692319406).

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

1816338450 is a wasteful number, since it uses less digits than its factorization.

1816338450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11139 (or 11134 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 1816338450 is about 42618.5223817063. The cubic root of 1816338450 is about 1220.1098284177.

The spelling of 1816338450 in words is "one billion, eight hundred sixteen million, three hundred thirty-eight thousand, four hundred fifty".