28660915 has 8 divisors (see below), whose sum is σ = 34427520. Its totient is φ = 22905792.

The previous prime is 28660909. The next prime is 28660991. The reversal of 28660915 is 51906682.

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 28660915 - 2¹¹ = 28658867 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4222 + ... + 8668.

It is an arithmetic number, because the mean of its divisors is an integer number (4303440).

Almost surely, 2^28660915 is an apocalyptic number.

28660915 is a deficient number, since it is larger than the sum of its proper divisors (5766605).

28660915 is a wasteful number, since it uses less digits than its factorization.

28660915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5741.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 28660915 is about 5353.5889831028. The cubic root of 28660915 is about 306.0295406285.

The spelling of 28660915 in words is "twenty-eight million, six hundred sixty thousand, nine hundred fifteen".