422389 has 16 divisors (see below), whose sum is σ = 506880. Its totient is φ = 347760.

The previous prime is 422377. The next prime is 422393. The reversal of 422389 is 983224.

422389 = 140² + 141² + ... + 158².

It is a cyclic number.

It is not a de Polignac number, because 422389 - 2¹¹ = 420341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422309) 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, 8964 + ... + 9010.

It is an arithmetic number, because the mean of its divisors is an integer number (31680).

2⁴²²³⁸⁹ is an apocalyptic number.

It is an amenable number.

422389 is a deficient number, since it is larger than the sum of its proper divisors (84491).

422389 is a wasteful number, since it uses less digits than its factorization.

422389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120.

The product of its digits is 3456, while the sum is 28.

The square root of 422389 is about 649.9146097758. The cubic root of 422389 is about 75.0304468974.

The spelling of 422389 in words is "four hundred twenty-two thousand, three hundred eighty-nine".