28135475 has 6 divisors (see below), whose sum is σ = 34888020. Its totient is φ = 22508360.

The previous prime is 28135439. The next prime is 28135483. The reversal of 28135475 is 57453182.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-28135475 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 562685 + ... + 562734.

It is an arithmetic number, because the mean of its divisors is an integer number (5814670).

Almost surely, 2^28135475 is an apocalyptic number.

28135475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28135475 is a deficient number, since it is larger than the sum of its proper divisors (6752545).

28135475 is a wasteful number, since it uses less digits than its factorization.

28135475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125429 (or 1125424 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 28135475 is about 5304.2883594315. The cubic root of 28135475 is about 304.1478497982.

The spelling of 28135475 in words is "twenty-eight million, one hundred thirty-five thousand, four hundred seventy-five".