16687552 has 42 divisors (see below), whose sum is σ = 38042088. Its totient is φ = 7114752.

The previous prime is 16687537. The next prime is 16687571. The reversal of 16687552 is 25578661.

16687552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86368 + ... + 86560.

It is an arithmetic number, because the mean of its divisors is an integer number (905764).

Almost surely, 2^16687552 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 16687552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19021044).

16687552 is an abundant number, since it is smaller than the sum of its proper divisors (21354536).

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

16687552 is an frugal number, since it uses more digits than its factorization.

16687552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 202 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 16687552 is about 4085.0400242837. The cubic root of 16687552 is about 255.5431304468.

Multiplying 16687552 by its product of digits (100800), we get a square (1682105241600 = 1296960²).

The spelling of 16687552 in words is "sixteen million, six hundred eighty-seven thousand, five hundred fifty-two".