28959915 has 16 divisors (see below), whose sum is σ = 46425600. Its totient is φ = 15415392.

The previous prime is 28959913. The next prime is 28959919. The reversal of 28959915 is 51995982.

It is a happy number.

It is not a de Polignac number, because 28959915 - 2¹ = 28959913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28959913) 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, 7726 + ... + 10844.

It is an arithmetic number, because the mean of its divisors is an integer number (2901600).

Almost surely, 2^28959915 is an apocalyptic number.

28959915 is a deficient number, since it is larger than the sum of its proper divisors (17465685).

28959915 is a wasteful number, since it uses less digits than its factorization.

28959915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746.

The product of its digits is 291600, while the sum is 48.

The square root of 28959915 is about 5381.4417213234. The cubic root of 28959915 is about 307.0900611820.

The spelling of 28959915 in words is "twenty-eight million, nine hundred fifty-nine thousand, nine hundred fifteen".