423640323 has 24 divisors (see below), whose sum is σ = 670269600. Its totient is φ = 256644864.

The previous prime is 423640319. The next prime is 423640337. The reversal of 423640323 is 323046324.

It is a happy number.

423640323 is a `hidden beast` number, since 4 + 236 + 403 + 23 = 666.

It is not a de Polignac number, because 423640323 - 2² = 423640319 is a prime.

It is a super-2 number, since 2×423640323² = 358942246543088658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (423600323) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 43303 + ... + 52176.

It is an arithmetic number, because the mean of its divisors is an integer number (27927900).

Almost surely, 2^423640323 is an apocalyptic number.

423640323 is a deficient number, since it is larger than the sum of its proper divisors (246629277).

423640323 is a wasteful number, since it uses less digits than its factorization.

423640323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95531 (or 95528 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

The square root of 423640323 is about 20582.5246993657. The cubic root of 423640323 is about 751.0446615674.

Adding to 423640323 its reverse (323046324), we get a palindrome (746686647).

The spelling of 423640323 in words is "four hundred twenty-three million, six hundred forty thousand, three hundred twenty-three".