28355325 has 12 divisors (see below), whose sum is σ = 46880928. Its totient is φ = 15122800.

The previous prime is 28355309. The next prime is 28355339. The reversal of 28355325 is 52355382.

It is not a de Polignac number, because 28355325 - 2⁴ = 28355309 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188961 + ... + 189110.

It is an arithmetic number, because the mean of its divisors is an integer number (3906744).

Almost surely, 2^28355325 is an apocalyptic number.

28355325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28355325 is a deficient number, since it is larger than the sum of its proper divisors (18525603).

28355325 is a wasteful number, since it uses less digits than its factorization.

28355325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378084 (or 378079 counting only the distinct ones).

The product of its digits is 36000, while the sum is 33.

The square root of 28355325 is about 5324.9718309114. The cubic root of 28355325 is about 304.9379968920.

It can be divided in two parts, 28355 and 325, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 28355325 in words is "twenty-eight million, three hundred fifty-five thousand, three hundred twenty-five".