491854998 has 32 divisors (see below), whose sum is σ = 995291136. Its totient is φ = 162031968.

The previous prime is 491854997. The next prime is 491855009. The reversal of 491854998 is 899458194.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491854991) 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, 222165 + ... + 224367.

It is an arithmetic number, because the mean of its divisors is an integer number (31102848).

Almost surely, 2^491854998 is an apocalyptic number.

491854998 is an abundant number, since it is smaller than the sum of its proper divisors (503436138).

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

491854998 is a wasteful number, since it uses less digits than its factorization.

491854998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628.

The product of its digits is 3732480, while the sum is 57.

The square root of 491854998 is about 22177.8041744443. The cubic root of 491854998 is about 789.3671147598.

The spelling of 491854998 in words is "four hundred ninety-one million, eight hundred fifty-four thousand, nine hundred ninety-eight".