28979347 has 4 divisors (see below), whose sum is σ = 28990576. Its totient is φ = 28968120.

The previous prime is 28979329. The next prime is 28979369. The reversal of 28979347 is 74397982.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28979347 - 2⁷ = 28979219 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 28979347.

It is not an unprimeable number, because it can be changed into a prime (28979647) 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, 418 + ... + 7624.

It is an arithmetic number, because the mean of its divisors is an integer number (7247644).

Almost surely, 2^28979347 is an apocalyptic number.

28979347 is a deficient number, since it is larger than the sum of its proper divisors (11229).

28979347 is an equidigital number, since it uses as much as digits as its factorization.

28979347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11228.

The product of its digits is 762048, while the sum is 49.

The square root of 28979347 is about 5383.2468826908. The cubic root of 28979347 is about 307.1587312716.

The spelling of 28979347 in words is "twenty-eight million, nine hundred seventy-nine thousand, three hundred forty-seven".