28634279 has 4 divisors (see below), whose sum is σ = 28679184. Its totient is φ = 28589376.

The previous prime is 28634269. The next prime is 28634299. The reversal of 28634279 is 97243682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28634279 - 2¹² = 28630183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28634219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21482 + ... + 22775.

It is an arithmetic number, because the mean of its divisors is an integer number (7169796).

Almost surely, 2^28634279 is an apocalyptic number.

28634279 is a deficient number, since it is larger than the sum of its proper divisors (44905).

28634279 is an equidigital number, since it uses as much as digits as its factorization.

28634279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44904.

The product of its digits is 145152, while the sum is 41.

The square root of 28634279 is about 5351.1007278877. The cubic root of 28634279 is about 305.9347084699.

The spelling of 28634279 in words is "twenty-eight million, six hundred thirty-four thousand, two hundred seventy-nine".