206997648 has 160 divisors (see below), whose sum is σ = 641208960. Its totient is φ = 56709120.

The previous prime is 206997641. The next prime is 206997667. The reversal of 206997648 is 846799602.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 206997648.

It is not an unprimeable number, because it can be changed into a prime (206997641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 363508 + ... + 364076.

It is an arithmetic number, because the mean of its divisors is an integer number (4007556).

Almost surely, 2^206997648 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 206997648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320604480).

206997648 is an abundant number, since it is smaller than the sum of its proper divisors (434211312).

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

206997648 is a wasteful number, since it uses less digits than its factorization.

206997648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 206997648 is about 14387.4128320557. The cubic root of 206997648 is about 591.5459295086.

The spelling of 206997648 in words is "two hundred six million, nine hundred ninety-seven thousand, six hundred forty-eight".