423994128 has 20 divisors (see below), whose sum is σ = 1095318288. Its totient is φ = 141331360.

The previous prime is 423994111. The next prime is 423994141. The reversal of 423994128 is 821499324.

It is a self number, because there is not a number n which added to its sum of digits gives 423994128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4416558 + ... + 4416653.

Almost surely, 2^423994128 is an apocalyptic number.

423994128 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

423994128 is an abundant number, since it is smaller than the sum of its proper divisors (671324160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423994128 is a wasteful number, since it uses less digits than its factorization.

423994128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8833222 (or 8833216 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 423994128 is about 20591.1176967157. The cubic root of 423994128 is about 751.2536827606.

The spelling of 423994128 in words is "four hundred twenty-three million, nine hundred ninety-four thousand, one hundred twenty-eight".