28361567 has 4 divisors (see below), whose sum is σ = 30543240. Its totient is φ = 26179896.

The previous prime is 28361563. The next prime is 28361587. The reversal of 28361567 is 76516382.

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 28361567 - 2² = 28361563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28361567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28361563) 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, 1090817 + ... + 1090842.

It is an arithmetic number, because the mean of its divisors is an integer number (7635810).

Almost surely, 2^28361567 is an apocalyptic number.

28361567 is a deficient number, since it is larger than the sum of its proper divisors (2181673).

28361567 is a wasteful number, since it uses less digits than its factorization.

28361567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181672.

The product of its digits is 60480, while the sum is 38.

The square root of 28361567 is about 5325.5579050462. The cubic root of 28361567 is about 304.9603710942.

The spelling of 28361567 in words is "twenty-eight million, three hundred sixty-one thousand, five hundred sixty-seven".