28135436 has 24 divisors (see below), whose sum is σ = 56802816. Its totient is φ = 11944080.

The previous prime is 28135433. The next prime is 28135439. The reversal of 28135436 is 63453182.

It is an interprime number because it is at equal distance from previous prime (28135433) and next prime (28135439).

It is not an unprimeable number, because it can be changed into a prime (28135433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700 + ... + 7691.

It is an arithmetic number, because the mean of its divisors is an integer number (2366784).

Almost surely, 2^28135436 is an apocalyptic number.

It is an amenable number.

28135436 is an abundant number, since it is smaller than the sum of its proper divisors (28667380).

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

28135436 is a wasteful number, since it uses less digits than its factorization.

28135436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9509 (or 9507 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 28135436 is about 5304.2846831595. The cubic root of 28135436 is about 304.1477092666.

The spelling of 28135436 in words is "twenty-eight million, one hundred thirty-five thousand, four hundred thirty-six".