28959867 has 6 divisors (see below), whose sum is σ = 41830932. Its totient is φ = 19306572.

The previous prime is 28959841. The next prime is 28959877. The reversal of 28959867 is 76895982.

It is a happy number.

It is not a de Polignac number, because 28959867 - 2¹⁴ = 28943483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28959877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1608873 + ... + 1608890.

It is an arithmetic number, because the mean of its divisors is an integer number (6971822).

Almost surely, 2^28959867 is an apocalyptic number.

28959867 is a deficient number, since it is larger than the sum of its proper divisors (12871065).

28959867 is a wasteful number, since it uses less digits than its factorization.

28959867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217769 (or 3217766 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 28959867 is about 5381.4372615501. The cubic root of 28959867 is about 307.0898915184.

The spelling of 28959867 in words is "twenty-eight million, nine hundred fifty-nine thousand, eight hundred sixty-seven".