28385615 has 16 divisors (see below), whose sum is σ = 35328000. Its totient is φ = 21872160.

The previous prime is 28385579. The next prime is 28385627. The reversal of 28385615 is 51658382.

It is not a de Polignac number, because 28385615 - 2¹² = 28381519 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56636 + ... + 57134.

It is an arithmetic number, because the mean of its divisors is an integer number (2208000).

Almost surely, 2^28385615 is an apocalyptic number.

28385615 is a deficient number, since it is larger than the sum of its proper divisors (6942385).

28385615 is a wasteful number, since it uses less digits than its factorization.

28385615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its digits is 57600, while the sum is 38.

The square root of 28385615 is about 5327.8152182672. The cubic root of 28385615 is about 305.0465395255.

The spelling of 28385615 in words is "twenty-eight million, three hundred eighty-five thousand, six hundred fifteen".