28328245 has 16 divisors (see below), whose sum is σ = 37195200. Its totient is φ = 20540800.

The previous prime is 28328243. The next prime is 28328257. The reversal of 28328245 is 54282382.

It is a happy number.

It is not a de Polignac number, because 28328245 - 2¹ = 28328243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28328245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28328243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26481 + ... + 27529.

It is an arithmetic number, because the mean of its divisors is an integer number (2324700).

Almost surely, 2^28328245 is an apocalyptic number.

It is an amenable number.

28328245 is a deficient number, since it is larger than the sum of its proper divisors (8866955).

28328245 is a wasteful number, since it uses less digits than its factorization.

28328245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556.

The product of its digits is 30720, while the sum is 34.

The square root of 28328245 is about 5322.4284870724. The cubic root of 28328245 is about 304.8408916613.

The spelling of 28328245 in words is "twenty-eight million, three hundred twenty-eight thousand, two hundred forty-five".