28523147 has 8 divisors (see below), whose sum is σ = 29272320. Its totient is φ = 27777960.

The previous prime is 28523119. The next prime is 28523177. The reversal of 28523147 is 74132582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28523147 - 2⁶ = 28523083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28523177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18122 + ... + 19632.

It is an arithmetic number, because the mean of its divisors is an integer number (3659040).

Almost surely, 2^28523147 is an apocalyptic number.

28523147 is a deficient number, since it is larger than the sum of its proper divisors (749173).

28523147 is a wasteful number, since it uses less digits than its factorization.

28523147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993.

The product of its digits is 13440, while the sum is 32.

The square root of 28523147 is about 5340.7066011905. The cubic root of 28523147 is about 305.5384093862.

It can be divided in two parts, 285 and 23147, that added together give a palindrome (23432).

The spelling of 28523147 in words is "twenty-eight million, five hundred twenty-three thousand, one hundred forty-seven".