28862225 has 18 divisors (see below), whose sum is σ = 41634054. Its totient is φ = 19790400.

The previous prime is 28862213. The next prime is 28862227. The reversal of 28862225 is 52226882.

It can be written as a sum of positive squares in 3 ways, for example, as 261121 + 28601104 = 511^2 + 5348^2 .

It is not a de Polignac number, because 28862225 - 2⁶ = 28862161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (28862227) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10556 + ... + 13005.

It is an arithmetic number, because the mean of its divisors is an integer number (2313003).

Almost surely, 2^28862225 is an apocalyptic number.

28862225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28862225 is a deficient number, since it is larger than the sum of its proper divisors (12771829).

28862225 is a wasteful number, since it uses less digits than its factorization.

28862225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23585 (or 23573 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The square root of 28862225 is about 5372.3574899666. The cubic root of 28862225 is about 306.7443715871.

The spelling of 28862225 in words is "twenty-eight million, eight hundred sixty-two thousand, two hundred twenty-five".