28888275 has 24 divisors (see below), whose sum is σ = 51437680. Its totient is φ = 14221440.

The previous prime is 28888271. The next prime is 28888283. The reversal of 28888275 is 57288882.

It is a happy number.

It is not a de Polignac number, because 28888275 - 2² = 28888271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28888271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13840 + ... + 15789.

Almost surely, 2^28888275 is an apocalyptic number.

28888275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28888275 is a deficient number, since it is larger than the sum of its proper divisors (22549405).

28888275 is a wasteful number, since it uses less digits than its factorization.

28888275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29655 (or 29650 counting only the distinct ones).

The product of its digits is 573440, while the sum is 48.

The square root of 28888275 is about 5374.7813909033. The cubic root of 28888275 is about 306.8366292936.

The spelling of 28888275 in words is "twenty-eight million, eight hundred eighty-eight thousand, two hundred seventy-five".