744540 has 24 divisors (see below), whose sum is σ = 2084880. Its totient is φ = 198528.

The previous prime is 744539. The next prime is 744547. The reversal of 744540 is 45447.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 744540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744547) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6145 + ... + 6264.

It is an arithmetic number, because the mean of its divisors is an integer number (86870).

2⁷⁴⁴⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

744540 is an abundant number, since it is smaller than the sum of its proper divisors (1340340).

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

744540 is a wasteful number, since it uses less digits than its factorization.

744540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12421 (or 12419 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 744540 is about 862.8673130905. The cubic root of 744540 is about 90.6350151437.

Adding to 744540 its reverse (45447), we get a palindrome (789987).

The spelling of 744540 in words is "seven hundred forty-four thousand, five hundred forty".