16448391 has 12 divisors (see below), whose sum is σ = 24207768. Its totient is φ = 10758384.

The previous prime is 16448363. The next prime is 16448407. The reversal of 16448391 is 19384461.

16448391 is a `hidden beast` number, since 1 + 644 + 8 + 3 + 9 + 1 = 666.

It is not a de Polignac number, because 16448391 - 2¹⁰ = 16447367 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16448591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16765 + ... + 17718.

It is an arithmetic number, because the mean of its divisors is an integer number (2017314).

Almost surely, 2^16448391 is an apocalyptic number.

16448391 is a deficient number, since it is larger than the sum of its proper divisors (7759377).

16448391 is a wasteful number, since it uses less digits than its factorization.

16448391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34542 (or 34539 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 16448391 is about 4055.6615983092. The cubic root of 16448391 is about 254.3164623515.

The spelling of 16448391 in words is "sixteen million, four hundred forty-eight thousand, three hundred ninety-one".