340478 has 4 divisors (see below), whose sum is σ = 510720. Its totient is φ = 170238.

The previous prime is 340477. The next prime is 340481. The reversal of 340478 is 874043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874043 = 587 ⋅1489.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340478.

It is not an unprimeable number, because it can be changed into a prime (340477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85118 + ... + 85121.

It is an arithmetic number, because the mean of its divisors is an integer number (127680).

2³⁴⁰⁴⁷⁸ is an apocalyptic number.

340478 is a deficient number, since it is larger than the sum of its proper divisors (170242).

340478 is a wasteful number, since it uses less digits than its factorization.

340478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170241.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 340478 is about 583.5049271429. The cubic root of 340478 is about 69.8280131563.

It can be divided in two parts, 340 and 478, that added together give a palindrome (818).

The spelling of 340478 in words is "three hundred forty thousand, four hundred seventy-eight".