28408079 has 8 divisors (see below), whose sum is σ = 33221760. Its totient is φ = 23783256.

The previous prime is 28408063. The next prime is 28408091. The reversal of 28408079 is 97080482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28408079 - 2⁴ = 28408063 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 (28408279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46889 + ... + 47490.

It is an arithmetic number, because the mean of its divisors is an integer number (4152720).

Almost surely, 2^28408079 is an apocalyptic number.

28408079 is a deficient number, since it is larger than the sum of its proper divisors (4813681).

28408079 is an equidigital number, since it uses as much as digits as its factorization.

28408079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94429.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 28408079 is about 5329.9229825580. The cubic root of 28408079 is about 305.1269882385.

The spelling of 28408079 in words is "twenty-eight million, four hundred eight thousand, seventy-nine".