208631712 has 96 divisors (see below), whose sum is σ = 581212800. Its totient is φ = 65387520.

The previous prime is 208631707. The next prime is 208631747. The reversal of 208631712 is 217136802.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 208631712.

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, 133914 + ... + 135462.

It is an arithmetic number, because the mean of its divisors is an integer number (6054300).

Almost surely, 2^208631712 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 208631712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290606400).

208631712 is an abundant number, since it is smaller than the sum of its proper divisors (372581088).

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

208631712 is a wasteful number, since it uses less digits than its factorization.

208631712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646 (or 1638 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 208631712 is about 14444.0891716993. The cubic root of 208631712 is about 593.0984293652.

The spelling of 208631712 in words is "two hundred eight million, six hundred thirty-one thousand, seven hundred twelve".