491257422 has 24 divisors (see below), whose sum is σ = 1064994840. Its totient is φ = 163659600.

The previous prime is 491257411. The next prime is 491257427. The reversal of 491257422 is 224752194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491257427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29797 + ... + 43247.

It is an arithmetic number, because the mean of its divisors is an integer number (44374785).

Almost surely, 2^491257422 is an apocalyptic number.

491257422 is an abundant number, since it is smaller than the sum of its proper divisors (573737418).

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

491257422 is a wasteful number, since it uses less digits than its factorization.

491257422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15488 (or 15485 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 491257422 is about 22164.3276911347. The cubic root of 491257422 is about 789.0473064110.

The spelling of 491257422 in words is "four hundred ninety-one million, two hundred fifty-seven thousand, four hundred twenty-two".