28533025 has 6 divisors (see below), whose sum is σ = 35380982. Its totient is φ = 22826400.

The previous prime is 28533017. The next prime is 28533047. The reversal of 28533025 is 52033582.

It can be written as a sum of positive squares in 3 ways, for example, as 559504 + 27973521 = 748^2 + 5289^2 .

It is not a de Polignac number, because 28533025 - 2³ = 28533017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28532984 and 28533002.

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, 570636 + ... + 570685.

Almost surely, 2^28533025 is an apocalyptic number.

28533025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28533025 is a deficient number, since it is larger than the sum of its proper divisors (6847957).

28533025 is a wasteful number, since it uses less digits than its factorization.

28533025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141331 (or 1141326 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 28533025 is about 5341.6313051352. The cubic root of 28533025 is about 305.5736761828.

The spelling of 28533025 in words is "twenty-eight million, five hundred thirty-three thousand, twenty-five".