28079393 has 8 divisors (see below), whose sum is σ = 29859840. Its totient is φ = 26313280.

The previous prime is 28079371. The next prime is 28079399. The reversal of 28079393 is 39397082.

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

It is a de Polignac number, because none of the positive numbers 2^k-28079393 is a prime.

It is a super-2 number, since 2×28079393² = 1576904622496898, which contains 22 as substring.

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 28079393.

It is not an unprimeable number, because it can be changed into a prime (28079399) 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, 608 + ... + 7518.

It is an arithmetic number, because the mean of its divisors is an integer number (3732480).

Almost surely, 2^28079393 is an apocalyptic number.

It is an amenable number.

28079393 is a deficient number, since it is larger than the sum of its proper divisors (1780447).

28079393 is a wasteful number, since it uses less digits than its factorization.

28079393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7167.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 28079393 is about 5298.9992451405. Note that the first 3 decimals coincide. The cubic root of 28079393 is about 303.9456310029.

The spelling of 28079393 in words is "twenty-eight million, seventy-nine thousand, three hundred ninety-three".