1813985298 has 24 divisors (see below), whose sum is σ = 4101185088. Its totient is φ = 578371992.

The previous prime is 1813985291. The next prime is 1813985317. The reversal of 1813985298 is 8925893181.

1813985298 is a `hidden beast` number, since 1 + 81 + 39 + 8 + 529 + 8 = 666.

It is a super-2 number, since 2×1813985298² = 6581085322720297608, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1813985291) 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, 2190390 + ... + 2191217.

It is an arithmetic number, because the mean of its divisors is an integer number (170882712).

Almost surely, 2^1813985298 is an apocalyptic number.

1813985298 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1813985298 is an abundant number, since it is smaller than the sum of its proper divisors (2287199790).

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

1813985298 is a wasteful number, since it uses less digits than its factorization.

1813985298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381638 (or 4381635 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 1813985298 is about 42590.9062829144. The cubic root of 1813985298 is about 1219.5826974637.

The spelling of 1813985298 in words is "one billion, eight hundred thirteen million, nine hundred eighty-five thousand, two hundred ninety-eight".