28815039 has 24 divisors (see below), whose sum is σ = 47798400. Its totient is φ = 16543440.

The previous prime is 28815029. The next prime is 28815043. The reversal of 28815039 is 93051882.

It is not a de Polignac number, because 28815039 - 2⁸ = 28814783 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28814994 and 28815012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28815029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5779 + ... + 9540.

It is an arithmetic number, because the mean of its divisors is an integer number (1991600).

Almost surely, 2^28815039 is an apocalyptic number.

28815039 is a deficient number, since it is larger than the sum of its proper divisors (18983361).

28815039 is a wasteful number, since it uses less digits than its factorization.

28815039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15355 (or 15352 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 28815039 is about 5367.9641392245. The cubic root of 28815039 is about 306.5771179674.

The spelling of 28815039 in words is "twenty-eight million, eight hundred fifteen thousand, thirty-nine".