491013576 has 112 divisors (see below), whose sum is σ = 1404723600. Its totient is φ = 160784352.

The previous prime is 491013553. The next prime is 491013577. The reversal of 491013576 is 675310194.

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

It is a self number, because there is not a number n which added to its sum of digits gives 491013576.

It is not an unprimeable number, because it can be changed into a prime (491013577) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 343375 + ... + 344801.

It is an arithmetic number, because the mean of its divisors is an integer number (12542175).

Almost surely, 2^491013576 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 491013576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (702361800).

491013576 is an abundant number, since it is smaller than the sum of its proper divisors (913710024).

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

491013576 is a wasteful number, since it uses less digits than its factorization.

491013576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 491013576 is about 22158.8261421944. The cubic root of 491013576 is about 788.9167313706.

The spelling of 491013576 in words is "four hundred ninety-one million, thirteen thousand, five hundred seventy-six".