28948791 has 8 divisors (see below), whose sum is σ = 38625264. Its totient is φ = 19285760.

The previous prime is 28948783. The next prime is 28948793. The reversal of 28948791 is 19784982.

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 28948791 - 2³ = 28948783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28948791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28948793) 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, 3925 + ... + 8561.

It is an arithmetic number, because the mean of its divisors is an integer number (4828158).

Almost surely, 2^28948791 is an apocalyptic number.

28948791 is a deficient number, since it is larger than the sum of its proper divisors (9676473).

28948791 is a wasteful number, since it uses less digits than its factorization.

28948791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721.

The product of its digits is 290304, while the sum is 48.

The square root of 28948791 is about 5380.4080700259. The cubic root of 28948791 is about 307.0507366268.

The spelling of 28948791 in words is "twenty-eight million, nine hundred forty-eight thousand, seven hundred ninety-one".