203440240 has 40 divisors (see below), whose sum is σ = 473965200. Its totient is φ = 81209856.

The previous prime is 203440217. The next prime is 203440271. The reversal of 203440240 is 42044302.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41436 + ... + 46084.

It is an arithmetic number, because the mean of its divisors is an integer number (11849130).

Almost surely, 2^203440240 is an apocalyptic number.

203440240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203440240 is an abundant number, since it is smaller than the sum of its proper divisors (270524960).

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

203440240 is a wasteful number, since it uses less digits than its factorization.

203440240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5209 (or 5203 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 203440240 is about 14263.2478769739. The cubic root of 203440240 is about 588.1376110580.

Adding to 203440240 its reverse (42044302), we get a palindrome (245484542).

The spelling of 203440240 in words is "two hundred three million, four hundred forty thousand, two hundred forty".