16491120 has 40 divisors (see below), whose sum is σ = 51123216. Its totient is φ = 4397568.

The previous prime is 16491089. The next prime is 16491133. The reversal of 16491120 is 2119461.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

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 7 ways as a sum of consecutive naturals, for example, 34117 + ... + 34596.

Almost surely, 2^16491120 is an apocalyptic number.

16491120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16491120 is an abundant number, since it is smaller than the sum of its proper divisors (34632096).

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

16491120 is a wasteful number, since it uses less digits than its factorization.

16491120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68729 (or 68723 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 16491120 is about 4060.9260027733. The cubic root of 16491120 is about 254.5364897894.

The spelling of 16491120 in words is "sixteen million, four hundred ninety-one thousand, one hundred twenty".