491422064 has 80 divisors (see below), whose sum is σ = 1126594560. Its totient is φ = 203281920.

The previous prime is 491422051. The next prime is 491422067. The reversal of 491422064 is 460224194.

It is a self number, because there is not a number n which added to its sum of digits gives 491422064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491422067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472457 + ... + 473495.

It is an arithmetic number, because the mean of its divisors is an integer number (14082432).

Almost surely, 2^491422064 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 491422064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (563297280).

491422064 is an abundant number, since it is smaller than the sum of its proper divisors (635172496).

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

491422064 is a wasteful number, since it uses less digits than its factorization.

491422064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 491422064 is about 22168.0415012242. The cubic root of 491422064 is about 789.1354447343.

The spelling of 491422064 in words is "four hundred ninety-one million, four hundred twenty-two thousand, sixty-four".