422678391 has 8 divisors (see below), whose sum is σ = 565765104. Its totient is φ = 280688640.

The previous prime is 422678381. The next prime is 422678441. The reversal of 422678391 is 193876224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 422678391 - 2⁵ = 422678359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422678371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273340 + ... + 274881.

It is an arithmetic number, because the mean of its divisors is an integer number (70720638).

Almost surely, 2^422678391 is an apocalyptic number.

422678391 is a deficient number, since it is larger than the sum of its proper divisors (143086713).

422678391 is a wasteful number, since it uses less digits than its factorization.

422678391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548481.

The product of its digits is 145152, while the sum is 42.

The square root of 422678391 is about 20559.1437321694. The cubic root of 422678391 is about 750.4757816675.

The spelling of 422678391 in words is "four hundred twenty-two million, six hundred seventy-eight thousand, three hundred ninety-one".