28817039 has 8 divisors (see below), whose sum is σ = 29897760. Its totient is φ = 27742176.

The previous prime is 28817003. The next prime is 28817069. The reversal of 28817039 is 93071882.

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 28817039 - 2²⁴ = 12039823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28816993 and 28817011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28817069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10262 + ... + 12764.

It is an arithmetic number, because the mean of its divisors is an integer number (3737220).

Almost surely, 2^28817039 is an apocalyptic number.

28817039 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28817039 is a deficient number, since it is larger than the sum of its proper divisors (1080721).

28817039 is a wasteful number, since it uses less digits than its factorization.

28817039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 28817039 is about 5368.1504263573. The cubic root of 28817039 is about 306.5842107919.

The spelling of 28817039 in words is "twenty-eight million, eight hundred seventeen thousand, thirty-nine".