28905315 has 16 divisors (see below), whose sum is σ = 47844000. Its totient is φ = 14884352.

The previous prime is 28905313. The next prime is 28905323. The reversal of 28905315 is 51350982.

It is a cyclic number.

It is not a de Polignac number, because 28905315 - 2¹ = 28905313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28905311) 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, 32790 + ... + 33659.

It is an arithmetic number, because the mean of its divisors is an integer number (2990250).

Almost surely, 2^28905315 is an apocalyptic number.

28905315 is a deficient number, since it is larger than the sum of its proper divisors (18938685).

28905315 is a wasteful number, since it uses less digits than its factorization.

28905315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66486.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 28905315 is about 5376.3663379647. The cubic root of 28905315 is about 306.8969475193.

The spelling of 28905315 in words is "twenty-eight million, nine hundred five thousand, three hundred fifteen".