422256393 has 12 divisors (see below), whose sum is σ = 656843460. Its totient is φ = 259850016.

The previous prime is 422256391. The next prime is 422256403. The reversal of 422256393 is 393652224.

It is a happy number.

422256393 is a `hidden beast` number, since 4 + 2 + 2 + 2 + 563 + 93 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 164557584 + 257698809 = 12828^2 + 16053^2 .

It is not a de Polignac number, because 422256393 - 2¹ = 422256391 is a prime.

It is a super-2 number, since 2×422256393² = 356600922858740898, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (422256391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1804398 + ... + 1804631.

It is an arithmetic number, because the mean of its divisors is an integer number (54736955).

Almost surely, 2^422256393 is an apocalyptic number.

It is an amenable number.

422256393 is a deficient number, since it is larger than the sum of its proper divisors (234587067).

422256393 is a wasteful number, since it uses less digits than its factorization.

422256393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609048 (or 3609045 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 422256393 is about 20548.8781445606. The cubic root of 422256393 is about 750.2259425931.

The spelling of 422256393 in words is "four hundred twenty-two million, two hundred fifty-six thousand, three hundred ninety-three".