423440633 has 16 divisors (see below), whose sum is σ = 528574464. Its totient is φ = 329548560.

The previous prime is 423440621. The next prime is 423440657. The reversal of 423440633 is 336044324.

It is not a de Polignac number, because 423440633 - 2⁶ = 423440569 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 423440596 and 423440605.

It is not an unprimeable number, because it can be changed into a prime (423440033) 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, 70016 + ... + 75822.

It is an arithmetic number, because the mean of its divisors is an integer number (33035904).

Almost surely, 2^423440633 is an apocalyptic number.

It is an amenable number.

423440633 is a deficient number, since it is larger than the sum of its proper divisors (105133831).

423440633 is a wasteful number, since it uses less digits than its factorization.

423440633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772.

The product of its (nonzero) digits is 20736, while the sum is 29.

The square root of 423440633 is about 20577.6731677807. The cubic root of 423440633 is about 750.9266371718.

Adding to 423440633 its reverse (336044324), we get a palindrome (759484957).

The spelling of 423440633 in words is "four hundred twenty-three million, four hundred forty thousand, six hundred thirty-three".