16520880 has 80 divisors (see below), whose sum is σ = 53925120. Its totient is φ = 4172544.

The previous prime is 16520879. The next prime is 16520893. The reversal of 16520880 is 8802561.

16520880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2749 + ... + 6371.

It is an arithmetic number, because the mean of its divisors is an integer number (674064).

Almost surely, 2^16520880 is an apocalyptic number.

16520880 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 16520880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26962560).

16520880 is an abundant number, since it is smaller than the sum of its proper divisors (37404240).

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

16520880 is a wasteful number, since it uses less digits than its factorization.

16520880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3658 (or 3652 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 16520880 is about 4064.5885400616. The cubic root of 16520880 is about 254.6895106043.

The spelling of 16520880 in words is "sixteen million, five hundred twenty thousand, eight hundred eighty".