28915867 has 2 divisors, whose sum is σ = 28915868. Its totient is φ = 28915866.

The previous prime is 28915849. The next prime is 28915889. The reversal of 28915867 is 76851982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28915867 - 2¹⁹ = 28391579 is a prime.

It is a super-2 number, since 2×28915867² = 1672254728723378, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28915837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14457933 + 14457934.

It is an arithmetic number, because the mean of its divisors is an integer number (14457934).

Almost surely, 2^28915867 is an apocalyptic number.

28915867 is a deficient number, since it is larger than the sum of its proper divisors (1).

28915867 is an equidigital number, since it uses as much as digits as its factorization.

28915867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 46.

The square root of 28915867 is about 5377.3475803597. The cubic root of 28915867 is about 306.9342876257.

The spelling of 28915867 in words is "twenty-eight million, nine hundred fifteen thousand, eight hundred sixty-seven".