340749 has 6 divisors (see below), whose sum is σ = 492206. Its totient is φ = 227160.

The previous prime is 340723. The next prime is 340757. The reversal of 340749 is 947043.

It can be written as a sum of positive squares in only one way, i.e., 338724 + 2025 = 582^2 + 45^2 .

It is not a de Polignac number, because 340749 - 2⁹ = 340237 is a prime.

It is a super-2 number, since 2×340749² = 232219762002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18922 + ... + 18939.

2³⁴⁰⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

340749 is a deficient number, since it is larger than the sum of its proper divisors (151457).

340749 is a wasteful number, since it uses less digits than its factorization.

340749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37867 (or 37864 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 340749 is about 583.7370983585. The cubic root of 340749 is about 69.8465345421.

It can be divided in two parts, 340 and 749, that added together give a square (1089 = 33²).

The spelling of 340749 in words is "three hundred forty thousand, seven hundred forty-nine".