28665316 has 9 divisors (see below), whose sum is σ = 50183049. Its totient is φ = 14327304.

The previous prime is 28665313. The next prime is 28665331. The reversal of 28665316 is 61356682.

The square root of 28665316 is 5354.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 532900 + 28132416 = 730^2 + 5304^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28665313) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9370 + ... + 12046.

Almost surely, 2^28665316 is an apocalyptic number.

28665316 is the 5354-th square number.

It is an amenable number.

28665316 is a deficient number, since it is larger than the sum of its proper divisors (21517733).

28665316 is an frugal number, since it uses more digits than its factorization.

28665316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5358 (or 2679 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The cubic root of 28665316 is about 306.0452038535.

The spelling of 28665316 in words is "twenty-eight million, six hundred sixty-five thousand, three hundred sixteen".