28679895 has 24 divisors (see below), whose sum is σ = 49838256. Its totient is φ = 15257088.

The previous prime is 28679879. The next prime is 28679899. The reversal of 28679895 is 59897682.

It is a happy number.

It is not a de Polignac number, because 28679895 - 2⁴ = 28679879 is a prime.

It is a super-2 number, since 2×28679895² = 1645072754422050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28679899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29812 + ... + 30758.

It is an arithmetic number, because the mean of its divisors is an integer number (2076594).

Almost surely, 2^28679895 is an apocalyptic number.

28679895 is a deficient number, since it is larger than the sum of its proper divisors (21158361).

28679895 is a wasteful number, since it uses less digits than its factorization.

28679895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631 (or 1628 counting only the distinct ones).

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

The square root of 28679895 is about 5355.3613323472. The cubic root of 28679895 is about 306.0970792840.

The spelling of 28679895 in words is "twenty-eight million, six hundred seventy-nine thousand, eight hundred ninety-five".