16005972 has 12 divisors (see below), whose sum is σ = 37347296. Its totient is φ = 5335320.

The previous prime is 16005967. The next prime is 16006009. The reversal of 16005972 is 27950061.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×16005972² = 512382279329568, which contains 22 as substring.

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, 666904 + ... + 666927.

Almost surely, 2^16005972 is an apocalyptic number.

16005972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16005972 is an abundant number, since it is smaller than the sum of its proper divisors (21341324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16005972 is a wasteful number, since it uses less digits than its factorization.

16005972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333838 (or 1333836 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 16005972 is about 4000.7464303552. The cubic root of 16005972 is about 252.0155571147.

The spelling of 16005972 in words is "sixteen million, five thousand, nine hundred seventy-two".