740447 has 4 divisors (see below), whose sum is σ = 743016. Its totient is φ = 737880.

The previous prime is 740429. The next prime is 740461. The reversal of 740447 is 744047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744047 = 137 ⋅5431.

It is a cyclic number.

It is not a de Polignac number, because 740447 - 2⁸ = 740191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788 + ... + 1449.

It is an arithmetic number, because the mean of its divisors is an integer number (185754).

2⁷⁴⁰⁴⁴⁷ is an apocalyptic number.

740447 is a deficient number, since it is larger than the sum of its proper divisors (2569).

740447 is a wasteful number, since it uses less digits than its factorization.

740447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 740447 is about 860.4923009534. The cubic root of 740447 is about 90.4686256129.

Subtracting 740447 from its reverse (744047), we obtain a square (3600 = 60²).

The spelling of 740447 in words is "seven hundred forty thousand, four hundred forty-seven", and thus it is an iban number.