740840 has 16 divisors (see below), whose sum is σ = 1666980. Its totient is φ = 296320.

The previous prime is 740801. The next prime is 740849. The reversal of 740840 is 48047.

It can be written as a sum of positive squares in 2 ways, for example, as 682276 + 58564 = 826^2 + 242^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740849) 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 3 ways as a sum of consecutive naturals, for example, 9221 + ... + 9300.

2⁷⁴⁰⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

740840 is an abundant number, since it is smaller than the sum of its proper divisors (926140).

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

740840 is a wasteful number, since it uses less digits than its factorization.

740840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18532 (or 18528 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 740840 is about 860.7206283110. The cubic root of 740840 is about 90.4846285056.

Adding to 740840 its reverse (48047), we get a palindrome (788887).

The spelling of 740840 in words is "seven hundred forty thousand, eight hundred forty".