28273715 has 4 divisors (see below), whose sum is σ = 33928464. Its totient is φ = 22618968.

The previous prime is 28273711. The next prime is 28273727. The reversal of 28273715 is 51737282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28273715 - 2² = 28273711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28273711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2827367 + ... + 2827376.

It is an arithmetic number, because the mean of its divisors is an integer number (8482116).

Almost surely, 2^28273715 is an apocalyptic number.

28273715 is a deficient number, since it is larger than the sum of its proper divisors (5654749).

28273715 is an equidigital number, since it uses as much as digits as its factorization.

28273715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5654748.

The product of its digits is 23520, while the sum is 35.

The square root of 28273715 is about 5317.3033579061. The cubic root of 28273715 is about 304.6451664962.

The spelling of 28273715 in words is "twenty-eight million, two hundred seventy-three thousand, seven hundred fifteen".