28333525 has 24 divisors (see below), whose sum is σ = 38595744. Its totient is φ = 20462400.

The previous prime is 28333523. The next prime is 28333553. The reversal of 28333525 is 52533382.

28333525 = T₃₁ + T₃₂ + ... + T₅₅₃.

It is not a de Polignac number, because 28333525 - 2¹ = 28333523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28333523) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 53914 + ... + 54436.

It is an arithmetic number, because the mean of its divisors is an integer number (1608156).

Almost surely, 2^28333525 is an apocalyptic number.

28333525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28333525 is a deficient number, since it is larger than the sum of its proper divisors (10262219).

28333525 is a wasteful number, since it uses less digits than its factorization.

28333525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 736 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 28333525 is about 5322.9244781417. The cubic root of 28333525 is about 304.8598298850.

The spelling of 28333525 in words is "twenty-eight million, three hundred thirty-three thousand, five hundred twenty-five".