898640 has 40 divisors (see below), whose sum is σ = 2142720. Its totient is φ = 350336.

The previous prime is 898621. The next prime is 898661. The reversal of 898640 is 46898.

898640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 898640.

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, 3641 + ... + 3879.

It is an arithmetic number, because the mean of its divisors is an integer number (53568).

2⁸⁹⁸⁶⁴⁰ is an apocalyptic number.

898640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 898640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1071360).

898640 is an abundant number, since it is smaller than the sum of its proper divisors (1244080).

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

898640 is a wasteful number, since it uses less digits than its factorization.

898640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 898640 is about 947.9662441248. The cubic root of 898640 is about 96.5002818859.

The spelling of 898640 in words is "eight hundred ninety-eight thousand, six hundred forty".