28089413 has 16 divisors (see below), whose sum is σ = 31344192. Its totient is φ = 24960000.

The previous prime is 28089377. The next prime is 28089419. The reversal of 28089413 is 31498082.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28089413 - 2⁶ = 28089349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28089419) 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, 145445 + ... + 145637.

It is an arithmetic number, because the mean of its divisors is an integer number (1959012).

Almost surely, 2^28089413 is an apocalyptic number.

It is an amenable number.

28089413 is a deficient number, since it is larger than the sum of its proper divisors (3254779).

28089413 is a wasteful number, since it uses less digits than its factorization.

28089413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28089413 is about 5299.9446223522. The cubic root of 28089413 is about 303.9817805621.

It can be divided in two parts, 2808 and 9413, that added together give a palindrome (12221).

The spelling of 28089413 in words is "twenty-eight million, eighty-nine thousand, four hundred thirteen".