28048523 has 4 divisors (see below), whose sum is σ = 29268048. Its totient is φ = 26829000.

The previous prime is 28048511. The next prime is 28048529. The reversal of 28048523 is 32584082.

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

It is a cyclic number.

It is not a de Polignac number, because 28048523 - 2⁴ = 28048507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28048523.

It is not an unprimeable number, because it can be changed into a prime (28048529) 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, 609728 + ... + 609773.

It is an arithmetic number, because the mean of its divisors is an integer number (7317012).

Almost surely, 2^28048523 is an apocalyptic number.

28048523 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28048523 is a deficient number, since it is larger than the sum of its proper divisors (1219525).

28048523 is a wasteful number, since it uses less digits than its factorization.

28048523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219524.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 28048523 is about 5296.0856299724. The cubic root of 28048523 is about 303.8342059665.

The spelling of 28048523 in words is "twenty-eight million, forty-eight thousand, five hundred twenty-three".