345740 has 24 divisors (see below), whose sum is σ = 740880. Its totient is φ = 135488.

The previous prime is 345739. The next prime is 345749. The reversal of 345740 is 47543.

It is a super-2 number, since 2×345740² = 239072295200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345749) 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, 1034 + ... + 1326.

It is an arithmetic number, because the mean of its divisors is an integer number (30870).

2³⁴⁵⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

345740 is an abundant number, since it is smaller than the sum of its proper divisors (395140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

345740 is a wasteful number, since it uses less digits than its factorization.

345740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 345740 is about 587.9965986296. The cubic root of 345740 is about 70.1859004213.

The spelling of 345740 in words is "three hundred forty-five thousand, seven hundred forty".