28207597 has 4 divisors (see below), whose sum is σ = 30771936. Its totient is φ = 25643260.

The previous prime is 28207561. The next prime is 28207643. The reversal of 28207597 is 79570282.

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 28207597 - 2¹⁵ = 28174829 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 (28207507) 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, 1282153 + ... + 1282174.

It is an arithmetic number, because the mean of its divisors is an integer number (7692984).

Almost surely, 2^28207597 is an apocalyptic number.

It is an amenable number.

28207597 is a deficient number, since it is larger than the sum of its proper divisors (2564339).

28207597 is a wasteful number, since it uses less digits than its factorization.

28207597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564338.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 28207597 is about 5311.0824697043. The cubic root of 28207597 is about 304.4075105364.

The spelling of 28207597 in words is "twenty-eight million, two hundred seven thousand, five hundred ninety-seven".