28915338 has 8 divisors (see below), whose sum is σ = 57830688. Its totient is φ = 9638444.

The previous prime is 28915319. The next prime is 28915361. The reversal of 28915338 is 83351982.

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

28915338 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28915296 and 28915305.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2409606 + ... + 2409617.

It is an arithmetic number, because the mean of its divisors is an integer number (7228836).

Almost surely, 2^28915338 is an apocalyptic number.

28915338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28915338 is a wasteful number, since it uses less digits than its factorization.

28915338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4819228.

The product of its digits is 51840, while the sum is 39.

The square root of 28915338 is about 5377.2983923156. The cubic root of 28915338 is about 306.9324158825.

The spelling of 28915338 in words is "twenty-eight million, nine hundred fifteen thousand, three hundred thirty-eight".