1898819868 has 24 divisors (see below), whose sum is σ = 4833360000. Its totient is φ = 575399920.

The previous prime is 1898819861. The next prime is 1898819917. The reversal of 1898819868 is 8689188981.

It is a super-2 number, since 2×1898819868² = 7211033782223074848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 1898819799 and 1898819808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1898819861) 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, 7192368 + ... + 7192631.

It is an arithmetic number, because the mean of its divisors is an integer number (201390000).

Almost surely, 2^1898819868 is an apocalyptic number.

It is an amenable number.

1898819868 is an abundant number, since it is smaller than the sum of its proper divisors (2934540132).

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

1898819868 is a wasteful number, since it uses less digits than its factorization.

1898819868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14385017 (or 14385015 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 66.

The square root of 1898819868 is about 43575.4502902724. The cubic root of 1898819868 is about 1238.3058437059.

The spelling of 1898819868 in words is "one billion, eight hundred ninety-eight million, eight hundred nineteen thousand, eight hundred sixty-eight".