28361657 has 4 divisors (see below), whose sum is σ = 28469760. Its totient is φ = 28253556.

The previous prime is 28361653. The next prime is 28361689. The reversal of 28361657 is 75616382.

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 28361657 - 2² = 28361653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28361657.

It is not an unprimeable number, because it can be changed into a prime (28361651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53657 + ... + 54182.

It is an arithmetic number, because the mean of its divisors is an integer number (7117440).

Almost surely, 2^28361657 is an apocalyptic number.

It is an amenable number.

28361657 is a deficient number, since it is larger than the sum of its proper divisors (108103).

28361657 is a wasteful number, since it uses less digits than its factorization.

28361657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108102.

The product of its digits is 60480, while the sum is 38.

The square root of 28361657 is about 5325.5663548584. The cubic root of 28361657 is about 304.9606936716.

The spelling of 28361657 in words is "twenty-eight million, three hundred sixty-one thousand, six hundred fifty-seven".