340744321 has 4 divisors (see below), whose sum is σ = 340906500. Its totient is φ = 340582144.

The previous prime is 340744307. The next prime is 340744361. The reversal of 340744321 is 123447043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 250873921 + 89870400 = 15839^2 + 9480^2 .

It is a cyclic number.

It is not a de Polignac number, because 340744321 - 2¹¹ = 340742273 is a prime.

It is a super-2 number, since 2×340744321² = 232213384587502082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340744321.

It is not an unprimeable number, because it can be changed into a prime (340744361) 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, 77896 + ... + 82153.

It is an arithmetic number, because the mean of its divisors is an integer number (85226625).

Almost surely, 2^340744321 is an apocalyptic number.

It is an amenable number.

340744321 is a deficient number, since it is larger than the sum of its proper divisors (162179).

340744321 is a wasteful number, since it uses less digits than its factorization.

340744321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162178.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 340744321 is about 18459.2611173904. The cubic root of 340744321 is about 698.4621484104.

The spelling of 340744321 in words is "three hundred forty million, seven hundred forty-four thousand, three hundred twenty-one".