28563667 has 8 divisors (see below), whose sum is σ = 32002992. Its totient is φ = 25264800.

The previous prime is 28563643. The next prime is 28563673. The reversal of 28563667 is 76636582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28563667 - 2¹⁵ = 28530899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28563467) 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, 34684 + ... + 35497.

It is an arithmetic number, because the mean of its divisors is an integer number (4000374).

Almost surely, 2^28563667 is an apocalyptic number.

28563667 is a deficient number, since it is larger than the sum of its proper divisors (3439325).

28563667 is a wasteful number, since it uses less digits than its factorization.

28563667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70229.

The product of its digits is 362880, while the sum is 43.

The square root of 28563667 is about 5344.4987604078. The cubic root of 28563667 is about 305.6830236116.

The spelling of 28563667 in words is "twenty-eight million, five hundred sixty-three thousand, six hundred sixty-seven".