16320872 has 8 divisors (see below), whose sum is σ = 30601650. Its totient is φ = 8160432.

The previous prime is 16320809. The next prime is 16320919. The reversal of 16320872 is 27802361.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15570916 + 749956 = 3946^2 + 866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 1020047 + ... + 1020062.

Almost surely, 2^16320872 is an apocalyptic number.

It is an amenable number.

16320872 is a deficient number, since it is larger than the sum of its proper divisors (14280778).

16320872 is a wasteful number, since it uses less digits than its factorization.

16320872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040115 (or 2040111 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 16320872 is about 4039.9098999854. The cubic root of 16320872 is about 253.6575458114.

It can be divided in two parts, 163 and 20872, that multiplied together give a triangular number (3402136 = T₂₆₀₈).

The spelling of 16320872 in words is "sixteen million, three hundred twenty thousand, eight hundred seventy-two".