23640434 has 8 divisors (see below), whose sum is σ = 35909760. Its totient is φ = 11670516.

The previous prime is 23640433. The next prime is 23640439. The reversal of 23640434 is 43404632.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (23640431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74654 + ... + 74969.

It is an arithmetic number, because the mean of its divisors is an integer number (4488720).

Almost surely, 2^23640434 is an apocalyptic number.

23640434 is a deficient number, since it is larger than the sum of its proper divisors (12269326).

23640434 is a wasteful number, since it uses less digits than its factorization.

23640434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149704.

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 23640434 is about 4862.1429431887. The cubic root of 23640434 is about 287.0021488506.

The spelling of 23640434 in words is "twenty-three million, six hundred forty thousand, four hundred thirty-four".