28210275 has 30 divisors (see below), whose sum is σ = 52258932. Its totient is φ = 15044400.

The previous prime is 28210271. The next prime is 28210277. The reversal of 28210275 is 57201282.

It is not a de Polignac number, because 28210275 - 2² = 28210271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28210271) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4941 + ... + 8990.

Almost surely, 2^28210275 is an apocalyptic number.

28210275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28210275 is a deficient number, since it is larger than the sum of its proper divisors (24048657).

28210275 is a wasteful number, since it uses less digits than its factorization.

28210275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13953 (or 13939 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28210275 is about 5311.3345780510. The cubic root of 28210275 is about 304.4171436093.

The spelling of 28210275 in words is "twenty-eight million, two hundred ten thousand, two hundred seventy-five".