28801135 has 8 divisors (see below), whose sum is σ = 37703376. Its totient is φ = 20946240.

The previous prime is 28801127. The next prime is 28801153. The reversal of 28801135 is 53110882.

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

It is not a de Polignac number, because 28801135 - 2³ = 28801127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261774 + ... + 261883.

It is an arithmetic number, because the mean of its divisors is an integer number (4712922).

Almost surely, 2^28801135 is an apocalyptic number.

28801135 is a deficient number, since it is larger than the sum of its proper divisors (8902241).

28801135 is a wasteful number, since it uses less digits than its factorization.

28801135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523673.

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

The square root of 28801135 is about 5366.6688923391. The cubic root of 28801135 is about 306.5277995768.

The spelling of 28801135 in words is "twenty-eight million, eight hundred one thousand, one hundred thirty-five".