491849496 has 72 divisors (see below), whose sum is σ = 1384180980. Its totient is φ = 163623888.

The previous prime is 491849471. The next prime is 491849507. The reversal of 491849496 is 694948194.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a tau number, because it is divible by the number of its divisors (72).

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 977581 + ... + 978083.

Almost surely, 2^491849496 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 491849496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (692090490).

491849496 is an abundant number, since it is smaller than the sum of its proper divisors (892331484).

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

491849496 is an frugal number, since it uses more digits than its factorization.

491849496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027 (or 508 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 491849496 is about 22177.6801311589. The cubic root of 491849496 is about 789.3641714032.

Multiplying 491849496 by its sum of digits (54), we get a square (26559872784 = 162972²).

491849496 divided by its sum of digits (54) gives a square (9108324 = 3018²).

The spelling of 491849496 in words is "four hundred ninety-one million, eight hundred forty-nine thousand, four hundred ninety-six".