28323717 has 16 divisors (see below), whose sum is σ = 40668480. Its totient is φ = 17468672.

The previous prime is 28323689. The next prime is 28323727. The reversal of 28323717 is 71732382.

It is a cyclic number.

It is not a de Polignac number, because 28323717 - 2¹⁴ = 28307333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28323727) 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, 1698 + ... + 7715.

It is an arithmetic number, because the mean of its divisors is an integer number (2541780).

Almost surely, 2^28323717 is an apocalyptic number.

It is an amenable number.

28323717 is a deficient number, since it is larger than the sum of its proper divisors (12344763).

28323717 is a wasteful number, since it uses less digits than its factorization.

28323717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9492.

The product of its digits is 14112, while the sum is 33.

The square root of 28323717 is about 5322.0031003373. The cubic root of 28323717 is about 304.8246488254.

Subtracting from 28323717 its sum of digits (33), we obtain a square (28323684 = 5322²).

The spelling of 28323717 in words is "twenty-eight million, three hundred twenty-three thousand, seven hundred seventeen".