740389 has 8 divisors (see below), whose sum is σ = 804440. Its totient is φ = 681408.

The previous prime is 740387. The next prime is 740423. The reversal of 740389 is 983047.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 311364 + 429025 = 558^2 + 655^2 .

It is not a de Polignac number, because 740389 - 2¹ = 740387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 740389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2029 + ... + 2365.

It is an arithmetic number, because the mean of its divisors is an integer number (100555).

2⁷⁴⁰³⁸⁹ is an apocalyptic number.

It is an amenable number.

740389 is a deficient number, since it is larger than the sum of its proper divisors (64051).

740389 is an equidigital number, since it uses as much as digits as its factorization.

740389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 740389 is about 860.4585986554. The cubic root of 740389 is about 90.4662633834.

It can be divided in two parts, 74038 and 9, that added together give a palindrome (74047).

The spelling of 740389 in words is "seven hundred forty thousand, three hundred eighty-nine".