491498928 has 100 divisors (see below), whose sum is σ = 1452987360. Its totient is φ = 160327296.

The previous prime is 491498923. The next prime is 491498933. The reversal of 491498928 is 829894194.

It is an interprime number because it is at equal distance from previous prime (491498923) and next prime (491498933).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (491498923) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56878 + ... + 64946.

Almost surely, 2^491498928 is an apocalyptic number.

491498928 is a gapful number since it is divisible by the number (48) 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 491498928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (726493680).

491498928 is an abundant number, since it is smaller than the sum of its proper divisors (961488432).

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

491498928 is a wasteful number, since it uses less digits than its factorization.

491498928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8136 (or 8121 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 491498928 is about 22169.7751003478. The cubic root of 491498928 is about 789.1765858423.

The spelling of 491498928 in words is "four hundred ninety-one million, four hundred ninety-eight thousand, nine hundred twenty-eight".