28180135 has 16 divisors (see below), whose sum is σ = 37692000. Its totient is φ = 20100096.

The previous prime is 28180121. The next prime is 28180151. The reversal of 28180135 is 53108182.

It is a cyclic number.

It is not a de Polignac number, because 28180135 - 2¹⁵ = 28147367 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7110 + ... + 10339.

It is an arithmetic number, because the mean of its divisors is an integer number (2355750).

Almost surely, 2^28180135 is an apocalyptic number.

28180135 is a deficient number, since it is larger than the sum of its proper divisors (9511865).

28180135 is a wasteful number, since it uses less digits than its factorization.

28180135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17490.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 28180135 is about 5308.4964914748. The cubic root of 28180135 is about 304.3086913730.

The spelling of 28180135 in words is "twenty-eight million, one hundred eighty thousand, one hundred thirty-five".