28712523 has 16 divisors (see below), whose sum is σ = 45262080. Its totient is φ = 15841056.

The previous prime is 28712521. The next prime is 28712531. The reversal of 28712523 is 32521782.

It is not a de Polignac number, because 28712523 - 2¹ = 28712521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28712521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22965 + ... + 24182.

It is an arithmetic number, because the mean of its divisors is an integer number (2828880).

Almost surely, 2^28712523 is an apocalyptic number.

28712523 is a deficient number, since it is larger than the sum of its proper divisors (16549557).

28712523 is a wasteful number, since it uses less digits than its factorization.

28712523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47186.

The product of its digits is 6720, while the sum is 30.

The square root of 28712523 is about 5358.4067594762. The cubic root of 28712523 is about 306.2131135360.

The spelling of 28712523 in words is "twenty-eight million, seven hundred twelve thousand, five hundred twenty-three".