740399 has 12 divisors (see below), whose sum is σ = 845880. Its totient is φ = 646800.

The previous prime is 740387. The next prime is 740423. The reversal of 740399 is 993047.

It is a happy number.

740399 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 740399 - 2⁸ = 740143 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740329) 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 11 ways as a sum of consecutive naturals, for example, 3404 + ... + 3614.

It is an arithmetic number, because the mean of its divisors is an integer number (70490).

2⁷⁴⁰³⁹⁹ is an apocalyptic number.

740399 is a deficient number, since it is larger than the sum of its proper divisors (105481).

740399 is a wasteful number, since it uses less digits than its factorization.

740399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 740399 is about 860.4644094906. The cubic root of 740399 is about 90.4666706732.

The spelling of 740399 in words is "seven hundred forty thousand, three hundred ninety-nine".