491724800 has 210 divisors, whose sum is σ = 1422552273. Its totient is φ = 168591360.

The previous prime is 491724799. The next prime is 491724803. The reversal of 491724800 is 8427194.

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 can be written as a sum of positive squares in 2 ways, for example, as 481890304 + 9834496 = 21952^2 + 3136^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=15680.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491724803) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 70246397 + ... + 70246403.

Almost surely, 2^491724800 is an apocalyptic number.

491724800 is a gapful number since it is divisible by the number (40) 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 491724800

491724800 is an abundant number, since it is smaller than the sum of its proper divisors (930827473).

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

491724800 is an frugal number, since it uses more digits than its factorization.

491724800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 491724800 is about 22174.8686580101. The cubic root of 491724800 is about 789.2974579913.

The spelling of 491724800 in words is "four hundred ninety-one million, seven hundred twenty-four thousand, eight hundred".