23828457 has 4 divisors (see below), whose sum is σ = 31771280. Its totient is φ = 15885636.

The previous prime is 23828449. The next prime is 23828473. The reversal of 23828457 is 75482832.

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 not a de Polignac number, because 23828457 - 2³ = 23828449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23828447) 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, 3971407 + ... + 3971412.

It is an arithmetic number, because the mean of its divisors is an integer number (7942820).

Almost surely, 2^23828457 is an apocalyptic number.

It is an amenable number.

23828457 is a deficient number, since it is larger than the sum of its proper divisors (7942823).

23828457 is an equidigital number, since it uses as much as digits as its factorization.

23828457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7942822.

The product of its digits is 107520, while the sum is 39.

The square root of 23828457 is about 4881.4400539185. The cubic root of 23828457 is about 287.7610262021.

The spelling of 23828457 in words is "twenty-three million, eight hundred twenty-eight thousand, four hundred fifty-seven".