28103275 has 6 divisors (see below), whose sum is σ = 34848092. Its totient is φ = 22482600.

The previous prime is 28103269. The next prime is 28103279. The reversal of 28103275 is 57230182.

It is a de Polignac number, because none of the positive numbers 2^k-28103275 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28103279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 562041 + ... + 562090.

Almost surely, 2^28103275 is an apocalyptic number.

28103275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28103275 is a deficient number, since it is larger than the sum of its proper divisors (6744817).

28103275 is a wasteful number, since it uses less digits than its factorization.

28103275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124141 (or 1124136 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28103275 is about 5301.2522105631. The cubic root of 28103275 is about 304.0317768895.

The spelling of 28103275 in words is "twenty-eight million, one hundred three thousand, two hundred seventy-five".