23240406 has 48 divisors (see below), whose sum is σ = 54558576. Its totient is φ = 6580224.

The previous prime is 23240381. The next prime is 23240417. The reversal of 23240406 is 60404232.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39990 + ... + 40566.

It is an arithmetic number, because the mean of its divisors is an integer number (1136637).

Almost surely, 2^23240406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23240406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27279288).

23240406 is an abundant number, since it is smaller than the sum of its proper divisors (31318170).

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

23240406 is a wasteful number, since it uses less digits than its factorization.

23240406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 23240406 is about 4820.8304263892. The cubic root of 23240406 is about 285.3741101189.

Adding to 23240406 its reverse (60404232), we get a palindrome (83644638).

The spelling of 23240406 in words is "twenty-three million, two hundred forty thousand, four hundred six".