16290720 has 144 divisors (see below), whose sum is σ = 57788640. Its totient is φ = 4333824.

The previous prime is 16290719. The next prime is 16290731. The reversal of 16290720 is 2709261.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 38671 + ... + 39089.

It is an arithmetic number, because the mean of its divisors is an integer number (401310).

Almost surely, 2^16290720 is an apocalyptic number.

16290720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16290720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28894320).

16290720 is an abundant number, since it is smaller than the sum of its proper divisors (41497920).

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

16290720 is an equidigital number, since it uses as much as digits as its factorization.

16290720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 16290720 is about 4036.1764084341. The cubic root of 16290720 is about 253.5012429476.

Adding to 16290720 its reverse (2709261), we get a palindrome (18999981).

The spelling of 16290720 in words is "sixteen million, two hundred ninety thousand, seven hundred twenty".