1898398 has 16 divisors (see below), whose sum is σ = 2993760. Its totient is φ = 901600.

The previous prime is 1898389. The next prime is 1898417. The reversal of 1898398 is 8938981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3888 + ... + 4348.

It is an arithmetic number, because the mean of its divisors is an integer number (187110).

2^1898398 is an apocalyptic number.

1898398 is a deficient number, since it is larger than the sum of its proper divisors (1095362).

1898398 is a wasteful number, since it uses less digits than its factorization.

1898398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563.

The product of its digits is 124416, while the sum is 46.

The square root of 1898398 is about 1377.8236461899. The cubic root of 1898398 is about 123.8214130547.

The spelling of 1898398 in words is "one million, eight hundred ninety-eight thousand, three hundred ninety-eight".