23428691 has 16 divisors (see below), whose sum is σ = 28976640. Its totient is φ = 18623520.

The previous prime is 23428673. The next prime is 23428739. The reversal of 23428691 is 19682432.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23428691 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (23428621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1595 + ... + 7028.

It is an arithmetic number, because the mean of its divisors is an integer number (1811040).

Almost surely, 2^23428691 is an apocalyptic number.

23428691 is a deficient number, since it is larger than the sum of its proper divisors (5547949).

23428691 is a wasteful number, since it uses less digits than its factorization.

23428691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8666.

The product of its digits is 20736, while the sum is 35.

The square root of 23428691 is about 4840.3193076490. The cubic root of 23428691 is about 286.1427026779.

The spelling of 23428691 in words is "twenty-three million, four hundred twenty-eight thousand, six hundred ninety-one".