201440 has 24 divisors (see below), whose sum is σ = 476280. Its totient is φ = 80512.

The previous prime is 201437. The next prime is 201449. The reversal of 201440 is 44102.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 201440.

It is not an unprimeable number, because it can be changed into a prime (201449) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 470 + ... + 789.

It is an arithmetic number, because the mean of its divisors is an integer number (19845).

2²⁰¹⁴⁴⁰ is an apocalyptic number.

201440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201440 is an abundant number, since it is smaller than the sum of its proper divisors (274840).

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

201440 is a wasteful number, since it uses less digits than its factorization.

201440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1266 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 201440 is about 448.8206768855. The cubic root of 201440 is about 58.6203721098.

Adding to 201440 its reverse (44102), we get a palindrome (245542).

The spelling of 201440 in words is "two hundred one thousand, four hundred forty", and thus it is an iban number.