200705640 has 64 divisors (see below), whose sum is σ = 610623360. Its totient is φ = 52765440.

The previous prime is 200705633. The next prime is 200705653. The reversal of 200705640 is 46507002.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 200705640.

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, 3259 + ... + 20298.

It is an arithmetic number, because the mean of its divisors is an integer number (9540990).

Almost surely, 2^200705640 is an apocalyptic number.

200705640 is a gapful number since it is divisible by the number (20) 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 200705640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305311680).

200705640 is an abundant number, since it is smaller than the sum of its proper divisors (409917720).

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

200705640 is a wasteful number, since it uses less digits than its factorization.

200705640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23642 (or 23638 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 200705640 is about 14167.0617984111. The cubic root of 200705640 is about 585.4905083223.

The spelling of 200705640 in words is "two hundred million, seven hundred five thousand, six hundred forty".