423218906 has 32 divisors (see below), whose sum is σ = 726800256. Its totient is φ = 182952000.

The previous prime is 423218903. The next prime is 423218921. The reversal of 423218906 is 609812324.

It is a super-2 number, since 2×423218906² = 358228484791673672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (423218903) 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 15 ways as a sum of consecutive naturals, for example, 89276 + ... + 93896.

It is an arithmetic number, because the mean of its divisors is an integer number (22712508).

Almost surely, 2^423218906 is an apocalyptic number.

423218906 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

423218906 is a deficient number, since it is larger than the sum of its proper divisors (303581350).

423218906 is a wasteful number, since it uses less digits than its factorization.

423218906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 423218906 is about 20572.2848998355. The cubic root of 423218906 is about 750.7955445875.

The spelling of 423218906 in words is "four hundred twenty-three million, two hundred eighteen thousand, nine hundred six".