28895139 has 24 divisors (see below), whose sum is σ = 51370592. Its totient is φ = 15240960.

The previous prime is 28895129. The next prime is 28895159. The reversal of 28895139 is 93159882.

It is a happy number.

It is not a de Polignac number, because 28895139 - 2¹⁷ = 28764067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28895094 and 28895103.

It is not an unprimeable number, because it can be changed into a prime (28895129) 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, 16822 + ... + 18459.

Almost surely, 2^28895139 is an apocalyptic number.

28895139 is a deficient number, since it is larger than the sum of its proper divisors (22475453).

28895139 is a wasteful number, since it uses less digits than its factorization.

28895139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35307 (or 35304 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 28895139 is about 5375.4198905760. The cubic root of 28895139 is about 306.8609293466.

The spelling of 28895139 in words is "twenty-eight million, eight hundred ninety-five thousand, one hundred thirty-nine".