1819398 has 16 divisors (see below), whose sum is σ = 4158720. Its totient is φ = 519816.

The previous prime is 1819397. The next prime is 1819409. The reversal of 1819398 is 8939181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819393) 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, 21618 + ... + 21701.

It is an arithmetic number, because the mean of its divisors is an integer number (259920).

2^1819398 is an apocalyptic number.

1819398 is an abundant number, since it is smaller than the sum of its proper divisors (2339322).

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

1819398 is a wasteful number, since it uses less digits than its factorization.

1819398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43331.

The product of its digits is 15552, while the sum is 39.

The square root of 1819398 is about 1348.8506218259. The cubic root of 1819398 is about 122.0794519637.

The spelling of 1819398 in words is "one million, eight hundred nineteen thousand, three hundred ninety-eight".