23909738 has 12 divisors (see below), whose sum is σ = 36203622. Its totient is φ = 11842560.

The previous prime is 23909737. The next prime is 23909777. The reversal of 23909738 is 83790932.

It can be written as a sum of positive squares in 3 ways, for example, as 23785129 + 124609 = 4877^2 + 353^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23909695 and 23909704.

It is not an unprimeable number, because it can be changed into a prime (23909737) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92906 + ... + 93162.

Almost surely, 2^23909738 is an apocalyptic number.

23909738 is a deficient number, since it is larger than the sum of its proper divisors (12293884).

23909738 is an equidigital number, since it uses as much as digits as its factorization.

23909738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 23909738 is about 4889.7584807432. The cubic root of 23909738 is about 288.0878477512.

The spelling of 23909738 in words is "twenty-three million, nine hundred nine thousand, seven hundred thirty-eight".