491110620 has 576 divisors, whose sum is σ = 2018774016. Its totient is φ = 86261760.

The previous prime is 491110591. The next prime is 491110681. The reversal of 491110620 is 26011194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 13273242 + ... + 13273278.

It is an arithmetic number, because the mean of its divisors is an integer number (3504816).

Almost surely, 2^491110620 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 491110620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1009387008).

491110620 is an abundant number, since it is smaller than the sum of its proper divisors (1527663396).

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

491110620 is a wasteful number, since it uses less digits than its factorization.

491110620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 491110620 is about 22161.0157709434. The cubic root of 491110620 is about 788.9687018223.

It can be divided in two parts, 491 and 110620, that added together give a palindrome (111111).

The spelling of 491110620 in words is "four hundred ninety-one million, one hundred ten thousand, six hundred twenty".