16491872 has 12 divisors (see below), whose sum is σ = 32468436. Its totient is φ = 8245920.

The previous prime is 16491859. The next prime is 16491883. The reversal of 16491872 is 27819461.

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 as a sum of consecutive naturals, namely, 257654 + ... + 257717.

It is an arithmetic number, because the mean of its divisors is an integer number (2705703).

Almost surely, 2^16491872 is an apocalyptic number.

It is an amenable number.

16491872 is a deficient number, since it is larger than the sum of its proper divisors (15976564).

16491872 is an equidigital number, since it uses as much as digits as its factorization.

16491872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515381 (or 515373 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 16491872 is about 4061.0185914374. The cubic root of 16491872 is about 254.5403587106.

The spelling of 16491872 in words is "sixteen million, four hundred ninety-one thousand, eight hundred seventy-two".