340388 has 12 divisors (see below), whose sum is σ = 609840. Its totient is φ = 166152.

The previous prime is 340387. The next prime is 340393. The reversal of 340388 is 883043.

It is not an unprimeable number, because it can be changed into a prime (340381) 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, 818 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (50820).

2³⁴⁰³⁸⁸ is an apocalyptic number.

It is an amenable number.

340388 is a deficient number, since it is larger than the sum of its proper divisors (269452).

340388 is a wasteful number, since it uses less digits than its factorization.

340388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026 (or 2024 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 340388 is about 583.4278018744. The cubic root of 340388 is about 69.8218599687.

The spelling of 340388 in words is "three hundred forty thousand, three hundred eighty-eight".