28723135 has 16 divisors (see below), whose sum is σ = 39758400. Its totient is φ = 19512576.

The previous prime is 28723129. The next prime is 28723169. The reversal of 28723135 is 53132782.

It is a cyclic number.

It is not a de Polignac number, because 28723135 - 2³ = 28723127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28723097 and 28723106.

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 15 ways as a sum of consecutive naturals, for example, 51 + ... + 7579.

It is an arithmetic number, because the mean of its divisors is an integer number (2484900).

Almost surely, 2^28723135 is an apocalyptic number.

28723135 is a deficient number, since it is larger than the sum of its proper divisors (11035265).

28723135 is a wasteful number, since it uses less digits than its factorization.

28723135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7650.

The product of its digits is 10080, while the sum is 31.

The square root of 28723135 is about 5359.3968877104. The cubic root of 28723135 is about 306.2508338170.

The spelling of 28723135 in words is "twenty-eight million, seven hundred twenty-three thousand, one hundred thirty-five".