28167907 has 2 divisors, whose sum is σ = 28167908. Its totient is φ = 28167906.

The previous prime is 28167869. The next prime is 28167911. The reversal of 28167907 is 70976182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28167907 - 2¹⁹ = 27643619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28167907.

It is not a weakly prime, because it can be changed into another prime (28167917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14083953 + 14083954.

It is an arithmetic number, because the mean of its divisors is an integer number (14083954).

Almost surely, 2^28167907 is an apocalyptic number.

28167907 is a deficient number, since it is larger than the sum of its proper divisors (1).

28167907 is an equidigital number, since it uses as much as digits as its factorization.

28167907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 28167907 is about 5307.3446279660. The cubic root of 28167907 is about 304.2646695230.

The spelling of 28167907 in words is "twenty-eight million, one hundred sixty-seven thousand, nine hundred seven".