28199265 has 16 divisors (see below), whose sum is σ = 47081088. Its totient is φ = 14385536.

The previous prime is 28199221. The next prime is 28199279. The reversal of 28199265 is 56299182.

It is a cyclic number.

It is not a de Polignac number, because 28199265 - 2⁷ = 28199137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40524 + ... + 41213.

It is an arithmetic number, because the mean of its divisors is an integer number (2942568).

Almost surely, 2^28199265 is an apocalyptic number.

It is an amenable number.

28199265 is a deficient number, since it is larger than the sum of its proper divisors (18881823).

28199265 is a wasteful number, since it uses less digits than its factorization.

28199265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81768.

The product of its digits is 77760, while the sum is 42.

The square root of 28199265 is about 5310.2980142361. The cubic root of 28199265 is about 304.3775354775.

The spelling of 28199265 in words is "twenty-eight million, one hundred ninety-nine thousand, two hundred sixty-five".