28707867 has 12 divisors (see below), whose sum is σ = 41698384. Its totient is φ = 19031760.

The previous prime is 28707863. The next prime is 28707869. The reversal of 28707867 is 76870782.

It is not a de Polignac number, because 28707867 - 2² = 28707863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28707863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7183 + ... + 10440.

Almost surely, 2^28707867 is an apocalyptic number.

28707867 is a deficient number, since it is larger than the sum of its proper divisors (12990517).

28707867 is a wasteful number, since it uses less digits than its factorization.

28707867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17810 (or 17807 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 28707867 is about 5357.9722843628. The cubic root of 28707867 is about 306.1965608825.

The spelling of 28707867 in words is "twenty-eight million, seven hundred seven thousand, eight hundred sixty-seven".