28740797 has 4 divisors (see below), whose sum is σ = 28756416. Its totient is φ = 28725180.

The previous prime is 28740791. The next prime is 28740799. The reversal of 28740797 is 79704782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28740797 - 2⁴ = 28740781 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 (28740791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4613 + ... + 8874.

It is an arithmetic number, because the mean of its divisors is an integer number (7189104).

Almost surely, 2^28740797 is an apocalyptic number.

It is an amenable number.

28740797 is a deficient number, since it is larger than the sum of its proper divisors (15619).

28740797 is a wasteful number, since it uses less digits than its factorization.

28740797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15618.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 28740797 is about 5361.0443945187. The cubic root of 28740797 is about 306.3135926805.

The spelling of 28740797 in words is "twenty-eight million, seven hundred forty thousand, seven hundred ninety-seven".