28582225 has 12 divisors (see below), whose sum is σ = 40505344. Its totient is φ = 19599120.

The previous prime is 28582199. The next prime is 28582231. The reversal of 28582225 is 52228582.

It is not a de Polignac number, because 28582225 - 2⁵ = 28582193 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81489 + ... + 81838.

Almost surely, 2^28582225 is an apocalyptic number.

28582225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28582225 is a deficient number, since it is larger than the sum of its proper divisors (11923119).

28582225 is a wasteful number, since it uses less digits than its factorization.

28582225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163344 (or 163339 counting only the distinct ones).

The product of its digits is 25600, while the sum is 34.

The square root of 28582225 is about 5346.2346562791. The cubic root of 28582225 is about 305.7492106950.

The spelling of 28582225 in words is "twenty-eight million, five hundred eighty-two thousand, two hundred twenty-five".