16001444 has 6 divisors (see below), whose sum is σ = 28002534. Its totient is φ = 8000720.

The previous prime is 16001443. The next prime is 16001467. The reversal of 16001444 is 44410061.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 1444 = 4000^2 + 38^2 .

It is not an unprimeable number, because it can be changed into a prime (16001441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000177 + ... + 2000184.

It is an arithmetic number, because the mean of its divisors is an integer number (4667089).

Almost surely, 2^16001444 is an apocalyptic number.

It is an amenable number.

16001444 is a deficient number, since it is larger than the sum of its proper divisors (12001090).

16001444 is a wasteful number, since it uses less digits than its factorization.

16001444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000365 (or 4000363 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 16001444 is about 4000.1804959277. The cubic root of 16001444 is about 251.9917902759.

It can be divided in two parts, 1600 and 1444, that multiplied together give a square (2310400 = 1520²).

The spelling of 16001444 in words is "sixteen million, one thousand, four hundred forty-four".