28363791 has 16 divisors (see below), whose sum is σ = 39398400. Its totient is φ = 18130560.

The previous prime is 28363763. The next prime is 28363813. The reversal of 28363791 is 19736382.

It is not a de Polignac number, because 28363791 - 2⁷ = 28363663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28363891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9160 + ... + 11858.

It is an arithmetic number, because the mean of its divisors is an integer number (2462400).

Almost surely, 2^28363791 is an apocalyptic number.

28363791 is a deficient number, since it is larger than the sum of its proper divisors (11034609).

28363791 is a wasteful number, since it uses less digits than its factorization.

28363791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846.

The product of its digits is 54432, while the sum is 39.

The square root of 28363791 is about 5325.7667053674. The cubic root of 28363791 is about 304.9683421410.

The spelling of 28363791 in words is "twenty-eight million, three hundred sixty-three thousand, seven hundred ninety-one".