740644 has 6 divisors (see below), whose sum is σ = 1296134. Its totient is φ = 370320.

The previous prime is 740603. The next prime is 740651. The reversal of 740644 is 446047.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 580644 + 160000 = 762^2 + 400^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92577 + ... + 92584.

2⁷⁴⁰⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

740644 is a deficient number, since it is larger than the sum of its proper divisors (555490).

740644 is a wasteful number, since it uses less digits than its factorization.

740644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185165 (or 185163 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 740644 is about 860.6067626971. The cubic root of 740644 is about 90.4766481268.

The spelling of 740644 in words is "seven hundred forty thousand, six hundred forty-four".