28328301 has 6 divisors (see below), whose sum is σ = 40918670. Its totient is φ = 18885528.

The previous prime is 28328299. The next prime is 28328323. The reversal of 28328301 is 10382382.

It can be written as a sum of positive squares in only one way, i.e., 23532201 + 4796100 = 4851^2 + 2190^2 .

It is not a de Polignac number, because 28328301 - 2¹ = 28328299 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28328381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1573786 + ... + 1573803.

Almost surely, 2^28328301 is an apocalyptic number.

It is an amenable number.

28328301 is a deficient number, since it is larger than the sum of its proper divisors (12590369).

28328301 is a wasteful number, since it uses less digits than its factorization.

28328301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3147595 (or 3147592 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28328301 is about 5322.4337478263. The cubic root of 28328301 is about 304.8410925336.

It can be divided in two parts, 28 and 328301, that added together give a square (328329 = 573²).

The spelling of 28328301 in words is "twenty-eight million, three hundred twenty-eight thousand, three hundred one".