28328235 has 32 divisors (see below), whose sum is σ = 49750848. Its totient is φ = 13678080.

The previous prime is 28328233. The next prime is 28328243. The reversal of 28328235 is 53282382.

It is not a de Polignac number, because 28328235 - 2¹ = 28328233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28328196 and 28328205.

It is not an unprimeable number, because it can be changed into a prime (28328233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8965 + ... + 11705.

It is an arithmetic number, because the mean of its divisors is an integer number (1554714).

Almost surely, 2^28328235 is an apocalyptic number.

28328235 is a deficient number, since it is larger than the sum of its proper divisors (21422613).

28328235 is a wasteful number, since it uses less digits than its factorization.

28328235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815.

The product of its digits is 23040, while the sum is 33.

The square root of 28328235 is about 5322.4275476515. The cubic root of 28328235 is about 304.8408557912.

The spelling of 28328235 in words is "twenty-eight million, three hundred twenty-eight thousand, two hundred thirty-five".