16520064 has 64 divisors (see below), whose sum is σ = 47882880. Its totient is φ = 5004800.

The previous prime is 16520027. The next prime is 16520099. The reversal of 16520064 is 46002561.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2269 + ... + 6179.

It is an arithmetic number, because the mean of its divisors is an integer number (748170).

Almost surely, 2^16520064 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 16520064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23941440).

16520064 is an abundant number, since it is smaller than the sum of its proper divisors (31362816).

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

16520064 is a wasteful number, since it uses less digits than its factorization.

16520064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939 (or 3927 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 16520064 is about 4064.4881596580. The cubic root of 16520064 is about 254.6853173236.

The spelling of 16520064 in words is "sixteen million, five hundred twenty thousand, sixty-four".