28500967 has 4 divisors (see below), whose sum is σ = 31091976. Its totient is φ = 25909960.

The previous prime is 28500919. The next prime is 28500991. The reversal of 28500967 is 76900582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28500967 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 (28500467) 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, 1295488 + ... + 1295509.

It is an arithmetic number, because the mean of its divisors is an integer number (7772994).

Almost surely, 2^28500967 is an apocalyptic number.

28500967 is a deficient number, since it is larger than the sum of its proper divisors (2591009).

28500967 is a wasteful number, since it uses less digits than its factorization.

28500967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591008.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 28500967 is about 5338.6296930954. The cubic root of 28500967 is about 305.4591918619.

The spelling of 28500967 in words is "twenty-eight million, five hundred thousand, nine hundred sixty-seven".