28791051 has 8 divisors (see below), whose sum is σ = 38448960. Its totient is φ = 19163592.

The previous prime is 28791041. The next prime is 28791073. The reversal of 28791051 is 15019782.

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

It is not a de Polignac number, because 28791051 - 2⁶ = 28790987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28791001) 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, 5305 + ... + 9258.

It is an arithmetic number, because the mean of its divisors is an integer number (4806120).

Almost surely, 2^28791051 is an apocalyptic number.

28791051 is a deficient number, since it is larger than the sum of its proper divisors (9657909).

28791051 is a wasteful number, since it uses less digits than its factorization.

28791051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15225.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 28791051 is about 5365.7293073729. The cubic root of 28791051 is about 306.4920210429.

The spelling of 28791051 in words is "twenty-eight million, seven hundred ninety-one thousand, fifty-one".