28089313 has 8 divisors (see below), whose sum is σ = 33209280. Its totient is φ = 23246160.

The previous prime is 28089241. The next prime is 28089337. The reversal of 28089313 is 31398082.

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

It is not a de Polignac number, because 28089313 - 2¹⁷ = 27958241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28089343) 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, 68983 + ... + 69388.

It is an arithmetic number, because the mean of its divisors is an integer number (4151160).

Almost surely, 2^28089313 is an apocalyptic number.

It is an amenable number.

28089313 is a deficient number, since it is larger than the sum of its proper divisors (5119967).

28089313 is a wasteful number, since it uses less digits than its factorization.

28089313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138407.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 28089313 is about 5299.9351882830. The cubic root of 28089313 is about 303.9814198305.

It can be divided in two parts, 2808 and 9313, that added together give a palindrome (12121).

The spelling of 28089313 in words is "twenty-eight million, eighty-nine thousand, three hundred thirteen".