28081135 has 8 divisors (see below), whose sum is σ = 34859520. Its totient is φ = 21690144.

The previous prime is 28081117. The next prime is 28081153. The reversal of 28081135 is 53118082.

It is an interprime number because it is at equal distance from previous prime (28081117) and next prime (28081153).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28081135 - 2⁷ = 28081007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96687 + ... + 96976.

It is an arithmetic number, because the mean of its divisors is an integer number (4357440).

Almost surely, 2^28081135 is an apocalyptic number.

28081135 is a deficient number, since it is larger than the sum of its proper divisors (6778385).

28081135 is a wasteful number, since it uses less digits than its factorization.

28081135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193697.

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

The square root of 28081135 is about 5299.1636132507. The cubic root of 28081135 is about 303.9519163043.

The spelling of 28081135 in words is "twenty-eight million, eighty-one thousand, one hundred thirty-five".