16291444 has 12 divisors (see below), whose sum is σ = 30703204. Its totient is φ = 7519104.

The previous prime is 16291439. The next prime is 16291463. The reversal of 16291444 is 44419261.

It can be written as a sum of positive squares in 2 ways, for example, as 1468944 + 14822500 = 1212^2 + 3850^2 .

It is a super-2 number, since 2×16291444² = 530822295210272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156597 + ... + 156700.

Almost surely, 2^16291444 is an apocalyptic number.

It is an amenable number.

16291444 is a deficient number, since it is larger than the sum of its proper divisors (14411760).

16291444 is a wasteful number, since it uses less digits than its factorization.

16291444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313314 (or 313312 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 16291444 is about 4036.2660962826. The cubic root of 16291444 is about 253.5049982999.

The spelling of 16291444 in words is "sixteen million, two hundred ninety-one thousand, four hundred forty-four".