23428529 has 4 divisors (see below), whose sum is σ = 24184320. Its totient is φ = 22672740.

The previous prime is 23428523. The next prime is 23428541. The reversal of 23428529 is 92582432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23428529 is a prime.

It is a super-2 number, since 2×23428529² = 1097791942207682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23428523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377849 + ... + 377910.

It is an arithmetic number, because the mean of its divisors is an integer number (6046080).

Almost surely, 2^23428529 is an apocalyptic number.

It is an amenable number.

23428529 is a deficient number, since it is larger than the sum of its proper divisors (755791).

23428529 is an equidigital number, since it uses as much as digits as its factorization.

23428529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755790.

The product of its digits is 34560, while the sum is 35.

The square root of 23428529 is about 4840.3025731869. The cubic root of 23428529 is about 286.1420431558.

The spelling of 23428529 in words is "twenty-three million, four hundred twenty-eight thousand, five hundred twenty-nine".