28938579 has 8 divisors (see below), whose sum is σ = 39526032. Its totient is φ = 18821760.

The previous prime is 28938563. The next prime is 28938599. The reversal of 28938579 is 97583982.

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

It is not a de Polignac number, because 28938579 - 2⁴ = 28938563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28938529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117514 + ... + 117759.

It is an arithmetic number, because the mean of its divisors is an integer number (4940754).

Almost surely, 2^28938579 is an apocalyptic number.

28938579 is a deficient number, since it is larger than the sum of its proper divisors (10587453).

28938579 is a wasteful number, since it uses less digits than its factorization.

28938579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235317.

The product of its digits is 1088640, while the sum is 51.

The square root of 28938579 is about 5379.4589876678. The cubic root of 28938579 is about 307.0146272213.

The spelling of 28938579 in words is "twenty-eight million, nine hundred thirty-eight thousand, five hundred seventy-nine".