28948225 has 6 divisors (see below), whose sum is σ = 35895830. Its totient is φ = 23158560.

The previous prime is 28948219. The next prime is 28948243. The reversal of 28948225 is 52284982.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 9199089 + 19749136 = 3033^2 + 4444^2 .

It is not a de Polignac number, because 28948225 - 2³ = 28948217 is a prime.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 578940 + ... + 578989.

Almost surely, 2^28948225 is an apocalyptic number.

28948225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28948225 is a deficient number, since it is larger than the sum of its proper divisors (6947605).

28948225 is a wasteful number, since it uses less digits than its factorization.

28948225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157939 (or 1157934 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 28948225 is about 5380.3554715279. The cubic root of 28948225 is about 307.0487354857.

The spelling of 28948225 in words is "twenty-eight million, nine hundred forty-eight thousand, two hundred twenty-five".