28648867 has 8 divisors (see below), whose sum is σ = 31848320. Its totient is φ = 25591680.

The previous prime is 28648843. The next prime is 28648871. The reversal of 28648867 is 76884682.

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 28648867 - 2²³ = 20260259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28648867.

It is not an unprimeable number, because it can be changed into a prime (28648877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35142 + ... + 35947.

It is an arithmetic number, because the mean of its divisors is an integer number (3981040).

Almost surely, 2^28648867 is an apocalyptic number.

28648867 is a deficient number, since it is larger than the sum of its proper divisors (3199453).

28648867 is a wasteful number, since it uses less digits than its factorization.

28648867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71133.

The product of its digits is 1032192, while the sum is 49.

The square root of 28648867 is about 5352.4636383632. The cubic root of 28648867 is about 305.9866534114.

The spelling of 28648867 in words is "twenty-eight million, six hundred forty-eight thousand, eight hundred sixty-seven".