28247915 has 8 divisors (see below), whose sum is σ = 33994080. Its totient is φ = 22533952.

The previous prime is 28247903. The next prime is 28247917. The reversal of 28247915 is 51974282.

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 28247915 - 2⁴ = 28247899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28247917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6074 + ... + 9663.

It is an arithmetic number, because the mean of its divisors is an integer number (4249260).

Almost surely, 2^28247915 is an apocalyptic number.

28247915 is a deficient number, since it is larger than the sum of its proper divisors (5746165).

28247915 is a wasteful number, since it uses less digits than its factorization.

28247915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16101.

The product of its digits is 40320, while the sum is 38.

The square root of 28247915 is about 5314.8767624471. The cubic root of 28247915 is about 304.5524745474.

The spelling of 28247915 in words is "twenty-eight million, two hundred forty-seven thousand, nine hundred fifteen".