23428641 has 4 divisors (see below), whose sum is σ = 31238192. Its totient is φ = 15619092.

The previous prime is 23428621. The next prime is 23428661. The reversal of 23428641 is 14682432.

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 an interprime number because it is at equal distance from previous prime (23428621) and next prime (23428661).

It is not a de Polignac number, because 23428641 - 2⁵ = 23428609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23428599 and 23428608.

It is not an unprimeable number, because it can be changed into a prime (23428621) 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 3 ways as a sum of consecutive naturals, for example, 3904771 + ... + 3904776.

It is an arithmetic number, because the mean of its divisors is an integer number (7809548).

Almost surely, 2^23428641 is an apocalyptic number.

It is an amenable number.

23428641 is a deficient number, since it is larger than the sum of its proper divisors (7809551).

23428641 is an equidigital number, since it uses as much as digits as its factorization.

23428641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7809550.

The product of its digits is 9216, while the sum is 30.

The square root of 23428641 is about 4840.3141426978. The cubic root of 23428641 is about 286.1424991220.

The spelling of 23428641 in words is "twenty-three million, four hundred twenty-eight thousand, six hundred forty-one".