28690316 has 12 divisors (see below), whose sum is σ = 50604288. Its totient is φ = 14231952.

The previous prime is 28690297. The next prime is 28690379. The reversal of 28690316 is 61309682.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27731 + ... + 28746.

It is an arithmetic number, because the mean of its divisors is an integer number (4217024).

Almost surely, 2^28690316 is an apocalyptic number.

It is an amenable number.

28690316 is a deficient number, since it is larger than the sum of its proper divisors (21913972).

28690316 is a wasteful number, since it uses less digits than its factorization.

28690316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56608 (or 56606 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 28690316 is about 5356.3341942041. The cubic root of 28690316 is about 306.1341488222.

Adding to 28690316 its reverse (61309682), we get a palindrome (89999998).

The spelling of 28690316 in words is "twenty-eight million, six hundred ninety thousand, three hundred sixteen".