28333325 has 6 divisors (see below), whose sum is σ = 35133354. Its totient is φ = 22666640.

The previous prime is 28333307. The next prime is 28333367. The reversal of 28333325 is 52333382.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 8743849 + 19589476 = 2957^2 + 4426^2 .

It is not a de Polignac number, because 28333325 - 2⁸ = 28333069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 566642 + ... + 566691.

It is an arithmetic number, because the mean of its divisors is an integer number (5855559).

Almost surely, 2^28333325 is an apocalyptic number.

28333325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28333325 is a deficient number, since it is larger than the sum of its proper divisors (6800029).

28333325 is a wasteful number, since it uses less digits than its factorization.

28333325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133343 (or 1133338 counting only the distinct ones).

The product of its digits is 12960, while the sum is 29.

The square root of 28333325 is about 5322.9056914433. The cubic root of 28333325 is about 304.8591125709.

The spelling of 28333325 in words is "twenty-eight million, three hundred thirty-three thousand, three hundred twenty-five".