422693257 has 12 divisors (see below), whose sum is σ = 493323600. Its totient is φ = 361115496.

The previous prime is 422693239. The next prime is 422693263. The reversal of 422693257 is 752396224.

It is not a de Polignac number, because 422693257 - 2²⁷ = 288475529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (422693207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 994 + ... + 29092.

It is an arithmetic number, because the mean of its divisors is an integer number (41110300).

Almost surely, 2^422693257 is an apocalyptic number.

It is an amenable number.

422693257 is a deficient number, since it is larger than the sum of its proper divisors (70630343).

422693257 is a wasteful number, since it uses less digits than its factorization.

422693257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28420 (or 28413 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

The square root of 422693257 is about 20559.5052712851. The cubic root of 422693257 is about 750.4845798794.

The spelling of 422693257 in words is "four hundred twenty-two million, six hundred ninety-three thousand, two hundred fifty-seven".