9819894 has 48 divisors (see below), whose sum is σ = 23113728. Its totient is φ = 2773008.

The previous prime is 9819889. The next prime is 9819899. The reversal of 9819894 is 4989189.

It is an interprime number because it is at equal distance from previous prime (9819889) and next prime (9819899).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9819899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37207 + ... + 37469.

It is an arithmetic number, because the mean of its divisors is an integer number (481536).

Almost surely, 2^9819894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9819894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11556864).

9819894 is an abundant number, since it is smaller than the sum of its proper divisors (13293834).

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

9819894 is a wasteful number, since it uses less digits than its factorization.

9819894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 402 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 9819894 is about 3133.6710101732. The cubic root of 9819894 is about 214.1422032110.

The spelling of 9819894 in words is "nine million, eight hundred nineteen thousand, eight hundred ninety-four".