28057135 has 8 divisors (see below), whose sum is σ = 33699456. Its totient is φ = 22425120.

The previous prime is 28057067. The next prime is 28057151. The reversal of 28057135 is 53175082.

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

It is not a de Polignac number, because 28057135 - 2²³ = 19668527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28057097 and 28057106.

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, 6045 + ... + 9625.

It is an arithmetic number, because the mean of its divisors is an integer number (4212432).

Almost surely, 2^28057135 is an apocalyptic number.

28057135 is a deficient number, since it is larger than the sum of its proper divisors (5642321).

28057135 is a wasteful number, since it uses less digits than its factorization.

28057135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5153.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 28057135 is about 5296.8986208913. The cubic root of 28057135 is about 303.8652991359.

The spelling of 28057135 in words is "twenty-eight million, fifty-seven thousand, one hundred thirty-five".