28695423 has 4 divisors (see below), whose sum is σ = 38260568. Its totient is φ = 19130280.

The previous prime is 28695397. The next prime is 28695479. The reversal of 28695423 is 32459682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28695423 - 2⁵ = 28695391 is a prime.

It is a super-2 number, since 2×28695423² = 1646854602297858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28695223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4782568 + ... + 4782573.

It is an arithmetic number, because the mean of its divisors is an integer number (9565142).

Almost surely, 2^28695423 is an apocalyptic number.

28695423 is a deficient number, since it is larger than the sum of its proper divisors (9565145).

28695423 is an equidigital number, since it uses as much as digits as its factorization.

28695423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9565144.

The product of its digits is 103680, while the sum is 39.

The square root of 28695423 is about 5356.8108982864. The cubic root of 28695423 is about 306.1523121442.

The spelling of 28695423 in words is "twenty-eight million, six hundred ninety-five thousand, four hundred twenty-three".