28908425 has 48 divisors (see below), whose sum is σ = 44913792. Its totient is φ = 17971200.

The previous prime is 28908421. The next prime is 28908469. The reversal of 28908425 is 52480982.

It is not a de Polignac number, because 28908425 - 2² = 28908421 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28908421) 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 47 ways as a sum of consecutive naturals, for example, 220610 + ... + 220740.

It is an arithmetic number, because the mean of its divisors is an integer number (935704).

Almost surely, 2^28908425 is an apocalyptic number.

28908425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28908425 is a deficient number, since it is larger than the sum of its proper divisors (16005367).

28908425 is a wasteful number, since it uses less digits than its factorization.

28908425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 28908425 is about 5376.6555589883. The cubic root of 28908425 is about 306.9079537452.

The spelling of 28908425 in words is "twenty-eight million, nine hundred eight thousand, four hundred twenty-five".