28867225 has 12 divisors (see below), whose sum is σ = 36403920. Its totient is φ = 22701200.

The previous prime is 28867217. The next prime is 28867253. The reversal of 28867225 is 52276882.

It is not a de Polignac number, because 28867225 - 2³ = 28867217 is a prime.

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, 8311 + ... + 11260.

It is an arithmetic number, because the mean of its divisors is an integer number (3033660).

Almost surely, 2^28867225 is an apocalyptic number.

28867225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28867225 is a deficient number, since it is larger than the sum of its proper divisors (7536695).

28867225 is a wasteful number, since it uses less digits than its factorization.

28867225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19640 (or 19635 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 28867225 is about 5372.8228148712. The cubic root of 28867225 is about 306.7620837039.

It can be divided in two parts, 28867 and 225, that added together give a palindrome (29092).

The spelling of 28867225 in words is "twenty-eight million, eight hundred sixty-seven thousand, two hundred twenty-five".