28658235 has 16 divisors (see below), whose sum is σ = 47435040. Its totient is φ = 14757120.

The previous prime is 28658233. The next prime is 28658237. The reversal of 28658235 is 53285682.

It is an interprime number because it is at equal distance from previous prime (28658233) and next prime (28658237).

It is not a de Polignac number, because 28658235 - 2¹ = 28658233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28658193 and 28658202.

It is not an unprimeable number, because it can be changed into a prime (28658233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32506 + ... + 33375.

It is an arithmetic number, because the mean of its divisors is an integer number (2964690).

Almost surely, 2^28658235 is an apocalyptic number.

28658235 is a deficient number, since it is larger than the sum of its proper divisors (18776805).

28658235 is a wasteful number, since it uses less digits than its factorization.

28658235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65918.

The product of its digits is 115200, while the sum is 39.

The square root of 28658235 is about 5353.3386778720. The cubic root of 28658235 is about 306.0200016829.

The spelling of 28658235 in words is "twenty-eight million, six hundred fifty-eight thousand, two hundred thirty-five".