16002720 has 72 divisors (see below), whose sum is σ = 54614196. Its totient is φ = 4267008.

The previous prime is 16002713. The next prime is 16002737. The reversal of 16002720 is 2720061.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13220496 + 2782224 = 3636^2 + 1668^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 16002693 and 16002702.

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 in 11 ways as a sum of consecutive naturals, for example, 4117 + ... + 6996.

Almost surely, 2^16002720 is an apocalyptic number.

16002720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16002720 is an abundant number, since it is smaller than the sum of its proper divisors (38611476).

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

16002720 is a wasteful number, since it uses less digits than its factorization.

16002720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11134 (or 11123 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 16002720 is about 4000.3399855512. The cubic root of 16002720 is about 251.9984882751.

Adding to 16002720 its reverse (2720061), we get a palindrome (18722781).

The spelling of 16002720 in words is "sixteen million, two thousand, seven hundred twenty".