491898 has 32 divisors (see below), whose sum is σ = 1114560. Its totient is φ = 143360.

The previous prime is 491873. The next prime is 491899. The reversal of 491898 is 898194.

It is not an unprimeable number, because it can be changed into a prime (491899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1786 + ... + 2042.

It is an arithmetic number, because the mean of its divisors is an integer number (34830).

2⁴⁹¹⁸⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557280).

491898 is an abundant number, since it is smaller than the sum of its proper divisors (622662).

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

491898 is a wasteful number, since it uses less digits than its factorization.

491898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302.

The product of its digits is 20736, while the sum is 39.

The square root of 491898 is about 701.3544039927. The cubic root of 491898 is about 78.9390118406.

The spelling of 491898 in words is "four hundred ninety-one thousand, eight hundred ninety-eight".