16791720 has 64 divisors (see below), whose sum is σ = 54959040. Its totient is φ = 4070400.

The previous prime is 16791707. The next prime is 16791721. The reversal of 16791720 is 2719761.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (16791721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5041 + ... + 7680.

It is an arithmetic number, because the mean of its divisors is an integer number (858735).

Almost surely, 2^16791720 is an apocalyptic number.

16791720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16791720 is an abundant number, since it is smaller than the sum of its proper divisors (38167320).

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

16791720 is a wasteful number, since it uses less digits than its factorization.

16791720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12746 (or 12742 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 16791720 is about 4097.7701253243. The cubic root of 16791720 is about 256.0737499105.

The spelling of 16791720 in words is "sixteen million, seven hundred ninety-one thousand, seven hundred twenty".