423221986 has 16 divisors (see below), whose sum is σ = 704285280. Its totient is φ = 189112480.

The previous prime is 423221963. The next prime is 423222001. The reversal of 423221986 is 689122324.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161731 + ... + 164326.

It is an arithmetic number, because the mean of its divisors is an integer number (44017830).

Almost surely, 2^423221986 is an apocalyptic number.

423221986 is a deficient number, since it is larger than the sum of its proper divisors (281063294).

423221986 is a wasteful number, since it uses less digits than its factorization.

423221986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326129.

The product of its digits is 41472, while the sum is 37.

The square root of 423221986 is about 20572.3597576943. The cubic root of 423221986 is about 750.7973659023.

The spelling of 423221986 in words is "four hundred twenty-three million, two hundred twenty-one thousand, nine hundred eighty-six".