28867279 has 4 divisors (see below), whose sum is σ = 32991184. Its totient is φ = 24743376.

The previous prime is 28867273. The next prime is 28867283. The reversal of 28867279 is 97276882.

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

It is not a de Polignac number, because 28867279 - 2³ = 28867271 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 (28867271) 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, 2061942 + ... + 2061955.

It is an arithmetic number, because the mean of its divisors is an integer number (8247796).

Almost surely, 2^28867279 is an apocalyptic number.

28867279 is a deficient number, since it is larger than the sum of its proper divisors (4123905).

28867279 is an equidigital number, since it uses as much as digits as its factorization.

28867279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123904.

The product of its digits is 677376, while the sum is 49.

The square root of 28867279 is about 5372.8278401602. The cubic root of 28867279 is about 306.7622749836.

The spelling of 28867279 in words is "twenty-eight million, eight hundred sixty-seven thousand, two hundred seventy-nine".