491215098 has 16 divisors (see below), whose sum is σ = 1071742176. Its totient is φ = 148853040.

The previous prime is 491215097. The next prime is 491215129. The reversal of 491215098 is 890512194.

It is not an unprimeable number, because it can be changed into a prime (491215091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3721261 + ... + 3721392.

It is an arithmetic number, because the mean of its divisors is an integer number (66983886).

Almost surely, 2^491215098 is an apocalyptic number.

491215098 is an abundant number, since it is smaller than the sum of its proper divisors (580527078).

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

491215098 is a wasteful number, since it uses less digits than its factorization.

491215098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7442669.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 491215098 is about 22163.3728931316. The cubic root of 491215098 is about 789.0246457882.

The spelling of 491215098 in words is "four hundred ninety-one million, two hundred fifteen thousand, ninety-eight".