1800668898 has 48 divisors (see below), whose sum is σ = 4512545856. Its totient is φ = 508275360.

The previous prime is 1800668887. The next prime is 1800668911. The reversal of 1800668898 is 8988660081.

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, 75633 + ... + 96548.

It is an arithmetic number, because the mean of its divisors is an integer number (94011372).

Almost surely, 2^1800668898 is an apocalyptic number.

1800668898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1800668898 is an abundant number, since it is smaller than the sum of its proper divisors (2711876958).

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

1800668898 is a wasteful number, since it uses less digits than its factorization.

1800668898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172279 (or 172276 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The square root of 1800668898 is about 42434.2891775036. The cubic root of 1800668898 is about 1216.5910609260.

The spelling of 1800668898 in words is "one billion, eight hundred million, six hundred sixty-eight thousand, eight hundred ninety-eight".