28673567 has 4 divisors (see below), whose sum is σ = 30879240. Its totient is φ = 26467896.

The previous prime is 28673549. The next prime is 28673573. The reversal of 28673567 is 76537682.

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

It is not a de Polignac number, because 28673567 - 2⁶ = 28673503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28673507) 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, 1102817 + ... + 1102842.

It is an arithmetic number, because the mean of its divisors is an integer number (7719810).

Almost surely, 2^28673567 is an apocalyptic number.

28673567 is a deficient number, since it is larger than the sum of its proper divisors (2205673).

28673567 is a wasteful number, since it uses less digits than its factorization.

28673567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205672.

The product of its digits is 423360, while the sum is 44.

The square root of 28673567 is about 5354.7704899463. The cubic root of 28673567 is about 306.0745649663.

The spelling of 28673567 in words is "twenty-eight million, six hundred seventy-three thousand, five hundred sixty-seven".