28616225 has 12 divisors (see below), whose sum is σ = 38710320. Its totient is φ = 20811600.

The previous prime is 28616213. The next prime is 28616267. The reversal of 28616225 is 52261682.

It is not a de Polignac number, because 28616225 - 2²² = 24421921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28616191 and 28616200.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 51755 + ... + 52304.

It is an arithmetic number, because the mean of its divisors is an integer number (3225860).

Almost surely, 2^28616225 is an apocalyptic number.

28616225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28616225 is a deficient number, since it is larger than the sum of its proper divisors (10094095).

28616225 is a wasteful number, since it uses less digits than its factorization.

28616225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104080 (or 104075 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 28616225 is about 5349.4135192561. The cubic root of 28616225 is about 305.8703973638.

The spelling of 28616225 in words is "twenty-eight million, six hundred sixteen thousand, two hundred twenty-five".