15320889 has 6 divisors (see below), whose sum is σ = 22130186. Its totient is φ = 10213920.

The previous prime is 15320881. The next prime is 15320891. The reversal of 15320889 is 98802351.

It can be written as a sum of positive squares in only one way, i.e., 15210000 + 110889 = 3900^2 + 333^2 .

It is not a de Polignac number, because 15320889 - 2³ = 15320881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15320881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 851152 + ... + 851169.

Almost surely, 2^15320889 is an apocalyptic number.

It is an amenable number.

15320889 is a deficient number, since it is larger than the sum of its proper divisors (6809297).

15320889 is a wasteful number, since it uses less digits than its factorization.

15320889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702327 (or 1702324 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 15320889 is about 3914.1907209537. The cubic root of 15320889 is about 248.3674368230.

The spelling of 15320889 in words is "fifteen million, three hundred twenty thousand, eight hundred eighty-nine".