28879671 has 4 divisors (see below), whose sum is σ = 38506232. Its totient is φ = 19253112.

The previous prime is 28879661. The next prime is 28879687. The reversal of 28879671 is 17697882.

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

It is not a de Polignac number, because 28879671 - 2⁹ = 28879159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28879671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28879661) 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, 4813276 + ... + 4813281.

It is an arithmetic number, because the mean of its divisors is an integer number (9626558).

Almost surely, 2^28879671 is an apocalyptic number.

28879671 is a deficient number, since it is larger than the sum of its proper divisors (9626561).

28879671 is an equidigital number, since it uses as much as digits as its factorization.

28879671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9626560.

The product of its digits is 338688, while the sum is 48.

The square root of 28879671 is about 5373.9809266502. The cubic root of 28879671 is about 306.8061638251.

The spelling of 28879671 in words is "twenty-eight million, eight hundred seventy-nine thousand, six hundred seventy-one".