23909730 has 64 divisors (see below), whose sum is σ = 62512128. Its totient is φ = 5817600.

The previous prime is 23909729. The next prime is 23909737. The reversal of 23909730 is 3790932.

It is a junction number, because it is equal to n+sod(n) for n = 23909691 and 23909700.

It is not an unprimeable number, because it can be changed into a prime (23909737) 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 31 ways as a sum of consecutive naturals, for example, 39087 + ... + 39693.

It is an arithmetic number, because the mean of its divisors is an integer number (976752).

Almost surely, 2^23909730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23909730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31256064).

23909730 is an abundant number, since it is smaller than the sum of its proper divisors (38602398).

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

23909730 is a wasteful number, since it uses less digits than its factorization.

23909730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 10206, while the sum is 33.

The square root of 23909730 is about 4889.7576627068. The cubic root of 23909730 is about 288.0878156206.

The spelling of 23909730 in words is "twenty-three million, nine hundred nine thousand, seven hundred thirty".