1019898 has 64 divisors (see below), whose sum is σ = 2643840. Its totient is φ = 288000.

The previous prime is 1019873. The next prime is 1019899. The reversal of 1019898 is 8989101.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1019899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10048 + ... + 10148.

It is an arithmetic number, because the mean of its divisors is an integer number (41310).

2^1019898 is an apocalyptic number.

1019898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1019898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1321920).

1019898 is an abundant number, since it is smaller than the sum of its proper divisors (1623942).

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

1019898 is a wasteful number, since it uses less digits than its factorization.

1019898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1019898 is about 1009.8999950490. The cubic root of 1019898 is about 100.6589154351.

It can be divided in two parts, 10198 and 98, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 1019898 in words is "one million, nineteen thousand, eight hundred ninety-eight".