1898814798 has 20 divisors (see below), whose sum is σ = 4254752040. Its totient is φ = 632938212.

The previous prime is 1898814787. The next prime is 1898814809. The reversal of 1898814798 is 8974188981.

1898814798 is a `hidden beast` number, since 1 + 89 + 8 + 81 + 479 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1898814787) and next prime (1898814809).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5860378 + ... + 5860701.

It is an arithmetic number, because the mean of its divisors is an integer number (212737602).

Almost surely, 2^1898814798 is an apocalyptic number.

1898814798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1898814798 is an abundant number, since it is smaller than the sum of its proper divisors (2355937242).

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

1898814798 is a wasteful number, since it uses less digits than its factorization.

1898814798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11721093 (or 11721084 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 63.

The square root of 1898814798 is about 43575.3921152753. The cubic root of 1898814798 is about 1238.3047415799.

The spelling of 1898814798 in words is "one billion, eight hundred ninety-eight million, eight hundred fourteen thousand, seven hundred ninety-eight".