340778 has 4 divisors (see below), whose sum is σ = 511170. Its totient is φ = 170388.

The previous prime is 340777. The next prime is 340787. The reversal of 340778 is 877043.

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

It can be written as a sum of positive squares in only one way, i.e., 305809 + 34969 = 553^2 + 187^2 .

It is a super-2 number, since 2×340778² = 232259290568, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 340778.

It is not an unprimeable number, because it can be changed into a prime (340777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85193 + ... + 85196.

2³⁴⁰⁷⁷⁸ is an apocalyptic number.

340778 is a deficient number, since it is larger than the sum of its proper divisors (170392).

340778 is a wasteful number, since it uses less digits than its factorization.

340778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170391.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 340778 is about 583.7619377794. The cubic root of 340778 is about 69.8485159537.

The spelling of 340778 in words is "three hundred forty thousand, seven hundred seventy-eight".