755440 has 80 divisors (see below), whose sum is σ = 2142720. Its totient is φ = 241920.

The previous prime is 755437. The next prime is 755441. The reversal of 755440 is 44557.

755440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (755441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10605 + ... + 10675.

It is an arithmetic number, because the mean of its divisors is an integer number (26784).

2⁷⁵⁵⁴⁴⁰ is an apocalyptic number.

755440 is a gapful number since it is divisible by the number (70) 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 755440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1071360).

755440 is an abundant number, since it is smaller than the sum of its proper divisors (1387280).

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

755440 is a wasteful number, since it uses less digits than its factorization.

755440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 755440 is about 869.1605145196. The cubic root of 755440 is about 91.0751703485.

Adding to 755440 its reverse (44557), we get a palindrome (799997).

The spelling of 755440 in words is "seven hundred fifty-five thousand, four hundred forty".