28880135 has 4 divisors (see below), whose sum is σ = 34656168. Its totient is φ = 23104104.

The previous prime is 28880123. The next prime is 28880147. The reversal of 28880135 is 53108882.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28880123) and next prime (28880147).

It is a cyclic number.

It is not a de Polignac number, because 28880135 - 2⁴ = 28880119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28880095 and 28880104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2888009 + ... + 2888018.

It is an arithmetic number, because the mean of its divisors is an integer number (8664042).

Almost surely, 2^28880135 is an apocalyptic number.

28880135 is a deficient number, since it is larger than the sum of its proper divisors (5776033).

28880135 is an equidigital number, since it uses as much as digits as its factorization.

28880135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5776032.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 28880135 is about 5374.0240974525. The cubic root of 28880135 is about 306.8078069335.

The spelling of 28880135 in words is "twenty-eight million, eight hundred eighty thousand, one hundred thirty-five".