28135910 has 64 divisors (see below), whose sum is σ = 58834944. Its totient is φ = 9590400.

The previous prime is 28135897. The next prime is 28135927. The reversal of 28135910 is 1953182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126059 + ... + 126281.

It is an arithmetic number, because the mean of its divisors is an integer number (919296).

Almost surely, 2^28135910 is an apocalyptic number.

28135910 is an abundant number, since it is smaller than the sum of its proper divisors (30699034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28135910 is a wasteful number, since it uses less digits than its factorization.

28135910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 28135910 is about 5304.3293638310. The cubic root of 28135910 is about 304.1494172574.

The spelling of 28135910 in words is "twenty-eight million, one hundred thirty-five thousand, nine hundred ten".