201440340 has 72 divisors (see below), whose sum is σ = 616805280. Its totient is φ = 53210304.

The previous prime is 201440303. The next prime is 201440353. The reversal of 201440340 is 43044102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14031 + ... + 24489.

It is an arithmetic number, because the mean of its divisors is an integer number (8566740).

Almost surely, 2^201440340 is an apocalyptic number.

201440340 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 201440340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308402640).

201440340 is an abundant number, since it is smaller than the sum of its proper divisors (415364940).

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

201440340 is a wasteful number, since it uses less digits than its factorization.

201440340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10581 (or 10576 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 201440340 is about 14192.9679771357. The cubic root of 201440340 is about 586.2040509053.

Adding to 201440340 its reverse (43044102), we get a palindrome (244484442).

The spelling of 201440340 in words is "two hundred one million, four hundred forty thousand, three hundred forty".