491849900 has 36 divisors (see below), whose sum is σ = 1072775088. Its totient is φ = 195733440.

The previous prime is 491849887. The next prime is 491849923. The reversal of 491849900 is 9948194.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7217 + ... + 32183.

It is an arithmetic number, because the mean of its divisors is an integer number (29799308).

Almost surely, 2^491849900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491849900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536387544).

491849900 is an abundant number, since it is smaller than the sum of its proper divisors (580925188).

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

491849900 is a wasteful number, since it uses less digits than its factorization.

491849900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25178 (or 25171 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 491849900 is about 22177.6892394136. The cubic root of 491849900 is about 789.3643875283.

The spelling of 491849900 in words is "four hundred ninety-one million, eight hundred forty-nine thousand, nine hundred".