16228439 has 4 divisors (see below), whose sum is σ = 16244256. Its totient is φ = 16212624.

The previous prime is 16228427. The next prime is 16228453. The reversal of 16228439 is 93482261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16228439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16228399 and 16228408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16228039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6254 + ... + 8459.

It is an arithmetic number, because the mean of its divisors is an integer number (4061064).

Almost surely, 2^16228439 is an apocalyptic number.

16228439 is a deficient number, since it is larger than the sum of its proper divisors (15817).

16228439 is a wasteful number, since it uses less digits than its factorization.

16228439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15816.

The product of its digits is 20736, while the sum is 35.

The square root of 16228439 is about 4028.4536735576. The cubic root of 16228439 is about 253.1777771168.

The spelling of 16228439 in words is "sixteen million, two hundred twenty-eight thousand, four hundred thirty-nine".