16520448 has 108 divisors (see below), whose sum is σ = 51263520. Its totient is φ = 4709376.

The previous prime is 16520429. The next prime is 16520473. The reversal of 16520448 is 84402561.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37413 + ... + 37851.

Almost surely, 2^16520448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16520448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25631760).

16520448 is an abundant number, since it is smaller than the sum of its proper divisors (34743072).

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

16520448 is an equidigital number, since it uses as much as digits as its factorization.

16520448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 16520448 is about 4064.5353978038. The cubic root of 16520448 is about 254.6872906493.

The spelling of 16520448 in words is "sixteen million, five hundred twenty thousand, four hundred forty-eight".