28938317 has 8 divisors (see below), whose sum is σ = 30028800. Its totient is φ = 27854064.

The previous prime is 28938313. The next prime is 28938383. The reversal of 28938317 is 71383982.

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

It is a cyclic number.

It is not a de Polignac number, because 28938317 - 2² = 28938313 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 (28938313) 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, 9284 + ... + 12002.

It is an arithmetic number, because the mean of its divisors is an integer number (3753600).

Almost surely, 2^28938317 is an apocalyptic number.

It is an amenable number.

28938317 is a deficient number, since it is larger than the sum of its proper divisors (1090483).

28938317 is a wasteful number, since it uses less digits than its factorization.

28938317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115.

The product of its digits is 72576, while the sum is 41.

The square root of 28938317 is about 5379.4346357215. The cubic root of 28938317 is about 307.0137006834.

The spelling of 28938317 in words is "twenty-eight million, nine hundred thirty-eight thousand, three hundred seventeen".