16448639 has 4 divisors (see below), whose sum is σ = 17416224. Its totient is φ = 15481056.

The previous prime is 16448617. The next prime is 16448651. The reversal of 16448639 is 93684461.

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-16448639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16448596 and 16448605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16444639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483767 + ... + 483800.

It is an arithmetic number, because the mean of its divisors is an integer number (4354056).

Almost surely, 2^16448639 is an apocalyptic number.

16448639 is a deficient number, since it is larger than the sum of its proper divisors (967585).

16448639 is an equidigital number, since it uses as much as digits as its factorization.

16448639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967584.

The product of its digits is 124416, while the sum is 41.

The square root of 16448639 is about 4055.6921727370. The cubic root of 16448639 is about 254.3177404941.

The spelling of 16448639 in words is "sixteen million, four hundred forty-eight thousand, six hundred thirty-nine".