28525523 has 8 divisors (see below), whose sum is σ = 31091088. Its totient is φ = 26013024.

The previous prime is 28525513. The next prime is 28525529. The reversal of 28525523 is 32552582.

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 28525523 - 2¹⁸ = 28263379 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 28525523.

It is not an unprimeable number, because it can be changed into a prime (28525529) 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, 12140 + ... + 14297.

It is an arithmetic number, because the mean of its divisors is an integer number (3886386).

Almost surely, 2^28525523 is an apocalyptic number.

28525523 is a deficient number, since it is larger than the sum of its proper divisors (2565565).

28525523 is a wasteful number, since it uses less digits than its factorization.

28525523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26533.

The product of its digits is 24000, while the sum is 32.

The square root of 28525523 is about 5340.9290390343. The cubic root of 28525523 is about 305.5468930118.

The spelling of 28525523 in words is "twenty-eight million, five hundred twenty-five thousand, five hundred twenty-three".