28135670 has 32 divisors (see below), whose sum is σ = 53265600. Its totient is φ = 10679680.

The previous prime is 28135661. The next prime is 28135673. The reversal of 28135670 is 7653182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28135673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33860 + ... + 34680.

It is an arithmetic number, because the mean of its divisors is an integer number (1664550).

Almost surely, 2^28135670 is an apocalyptic number.

28135670 is a deficient number, since it is larger than the sum of its proper divisors (25129930).

28135670 is a wasteful number, since it uses less digits than its factorization.

28135670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 28135670 is about 5304.3067407532. The cubic root of 28135670 is about 304.1485524543.

The spelling of 28135670 in words is "twenty-eight million, one hundred thirty-five thousand, six hundred seventy".