28920325 has 24 divisors (see below), whose sum is σ = 41693760. Its totient is φ = 19488000.

The previous prime is 28920323. The next prime is 28920341. The reversal of 28920325 is 52302982.

It is not a de Polignac number, because 28920325 - 2¹ = 28920323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28920323) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 8925 + ... + 11725.

It is an arithmetic number, because the mean of its divisors is an integer number (1737240).

Almost surely, 2^28920325 is an apocalyptic number.

28920325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28920325 is a deficient number, since it is larger than the sum of its proper divisors (12773435).

28920325 is a wasteful number, since it uses less digits than its factorization.

28920325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877 (or 2872 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 28920325 is about 5377.7620810147. The cubic root of 28920325 is about 306.9500603125.

The spelling of 28920325 in words is "twenty-eight million, nine hundred twenty thousand, three hundred twenty-five".