28659601 has 4 divisors (see below), whose sum is σ = 28735600. Its totient is φ = 28583604.

The previous prime is 28659599. The next prime is 28659607. The reversal of 28659601 is 10695682.

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 28659601 - 2¹ = 28659599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28659607) 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, 37431 + ... + 38188.

It is an arithmetic number, because the mean of its divisors is an integer number (7183900).

Almost surely, 2^28659601 is an apocalyptic number.

It is an amenable number.

28659601 is a deficient number, since it is larger than the sum of its proper divisors (75999).

28659601 is an equidigital number, since it uses as much as digits as its factorization.

28659601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75998.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 28659601 is about 5353.4662602841. The cubic root of 28659601 is about 306.0248637720.

The spelling of 28659601 in words is "twenty-eight million, six hundred fifty-nine thousand, six hundred one".