422425809 has 81 divisors (see below), whose sum is σ = 725240529. Its totient is φ = 236770560.

The previous prime is 422425777. The next prime is 422425853. The reversal of 422425809 is 908524224.

The square root of 422425809 is 20553.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3814209 + 418611600 = 1953^2 + 20460^2 .

It is not a de Polignac number, because 422425809 - 2⁵ = 422425777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (422420809) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 13626624 + ... + 13626654.

Almost surely, 2^422425809 is an apocalyptic number.

422425809 is the 20553-rd square number.

422425809 is the 10277-th centered octagonal number.

It is an amenable number.

422425809 is a deficient number, since it is larger than the sum of its proper divisors (302814720).

422425809 is a wasteful number, since it uses less digits than its factorization.

422425809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The cubic root of 422425809 is about 750.3262633824.

Multiplying 422425809 by its sum of digits (36), we get a square (15207329124 = 123318²).

The spelling of 422425809 in words is "four hundred twenty-two million, four hundred twenty-five thousand, eight hundred nine".