28325238 has 32 divisors (see below), whose sum is σ = 59875200. Its totient is φ = 8908416.

The previous prime is 28325203. The next prime is 28325243. The reversal of 28325238 is 83252382.

It is a junction number, because it is equal to n+sod(n) for n = 28325199 and 28325208.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 47470 + ... + 48062.

It is an arithmetic number, because the mean of its divisors is an integer number (1871100).

Almost surely, 2^28325238 is an apocalyptic number.

28325238 is an abundant number, since it is smaller than the sum of its proper divisors (31549962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28325238 is a wasteful number, since it uses less digits than its factorization.

28325238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036.

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

The square root of 28325238 is about 5322.1459957427. The cubic root of 28325238 is about 304.8301051477.

It can be divided in two parts, 2 and 8325238, that added together give a triangular number (8325240 = T₄₀₈₀).

The spelling of 28325238 in words is "twenty-eight million, three hundred twenty-five thousand, two hundred thirty-eight".