28000797 has 16 divisors (see below), whose sum is σ = 41223168. Its totient is φ = 16764080.

The previous prime is 28000789. The next prime is 28000799. The reversal of 28000797 is 79700082.

It is a cyclic number.

It is not a de Polignac number, because 28000797 - 2³ = 28000789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000799) 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, 2373 + ... + 7850.

It is an arithmetic number, because the mean of its divisors is an integer number (2576448).

Almost surely, 2^28000797 is an apocalyptic number.

It is an amenable number.

28000797 is a deficient number, since it is larger than the sum of its proper divisors (13222371).

28000797 is a wasteful number, since it uses less digits than its factorization.

28000797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10320.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 28000797 is about 5291.5779310145. The cubic root of 28000797 is about 303.6617783048.

The spelling of 28000797 in words is "twenty-eight million, seven hundred ninety-seven", and thus it is an aban number.