28561135 has 8 divisors (see below), whose sum is σ = 34357680. Its totient is φ = 22792704.

The previous prime is 28561111. The next prime is 28561153. The reversal of 28561135 is 53116582.

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

It is a cyclic number.

It is not a de Polignac number, because 28561135 - 2¹³ = 28552943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28561097 and 28561106.

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, 4722 + ... + 8911.

It is an arithmetic number, because the mean of its divisors is an integer number (4294710).

Almost surely, 2^28561135 is an apocalyptic number.

28561135 is a deficient number, since it is larger than the sum of its proper divisors (5796545).

28561135 is a wasteful number, since it uses less digits than its factorization.

28561135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14057.

The product of its digits is 7200, while the sum is 31.

The square root of 28561135 is about 5344.2618760686. The cubic root of 28561135 is about 305.6739910145.

The spelling of 28561135 in words is "twenty-eight million, five hundred sixty-one thousand, one hundred thirty-five".