491530464 has 96 divisors (see below), whose sum is σ = 1438244640. Its totient is φ = 163316736.

The previous prime is 491530453. The next prime is 491530489. The reversal of 491530464 is 464035194.

491530464 is a `hidden beast` number, since 49 + 153 + 0 + 464 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342292 + ... + 343724.

It is an arithmetic number, because the mean of its divisors is an integer number (14981715).

Almost surely, 2^491530464 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 491530464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719122320).

491530464 is an abundant number, since it is smaller than the sum of its proper divisors (946714176).

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

491530464 is a wasteful number, since it uses less digits than its factorization.

491530464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 491530464 is about 22170.4863275482. The cubic root of 491530464 is about 789.1934641026.

The spelling of 491530464 in words is "four hundred ninety-one million, five hundred thirty thousand, four hundred sixty-four".