28266601 has 4 divisors (see below), whose sum is σ = 30836304. Its totient is φ = 25696900.

The previous prime is 28266593. The next prime is 28266629. The reversal of 28266601 is 10666282.

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 28266601 - 2³ = 28266593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28266691) 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, 1284835 + ... + 1284856.

It is an arithmetic number, because the mean of its divisors is an integer number (7709076).

Almost surely, 2^28266601 is an apocalyptic number.

It is an amenable number.

28266601 is a deficient number, since it is larger than the sum of its proper divisors (2569703).

28266601 is a wasteful number, since it uses less digits than its factorization.

28266601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569702.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28266601 is about 5316.6343677180. The cubic root of 28266601 is about 304.6196135812.

The spelling of 28266601 in words is "twenty-eight million, two hundred sixty-six thousand, six hundred one".