28960391 has 8 divisors (see below), whose sum is σ = 29752800. Its totient is φ = 28172160.

The previous prime is 28960363. The next prime is 28960423. The reversal of 28960391 is 19306982.

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 28960391 - 2¹⁰ = 28959367 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 (28960331) 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, 17195 + ... + 18803.

It is an arithmetic number, because the mean of its divisors is an integer number (3719100).

Almost surely, 2^28960391 is an apocalyptic number.

28960391 is a deficient number, since it is larger than the sum of its proper divisors (792409).

28960391 is a wasteful number, since it uses less digits than its factorization.

28960391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 28960391 is about 5381.4859472083. The cubic root of 28960391 is about 307.0917436693.

The spelling of 28960391 in words is "twenty-eight million, nine hundred sixty thousand, three hundred ninety-one".