340520 has 16 divisors (see below), whose sum is σ = 766260. Its totient is φ = 136192.

The previous prime is 340519. The next prime is 340541. The reversal of 340520 is 25043.

340520 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in 2 ways, for example, as 320356 + 20164 = 566^2 + 142^2 .

It is a d-powerful number, because it can be written as 3⁵ + 4⁹ + 5⁷ + 0 + 2³ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 340495 and 340504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4217 + ... + 4296.

2³⁴⁰⁵²⁰ is an apocalyptic number.

It is an amenable number.

340520 is an abundant number, since it is smaller than the sum of its proper divisors (425740).

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

340520 is a wasteful number, since it uses less digits than its factorization.

340520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8524 (or 8520 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 340520 is about 583.5409154464. The cubic root of 340520 is about 69.8308842728.

Adding to 340520 its reverse (25043), we get a palindrome (365563).

The spelling of 340520 in words is "three hundred forty thousand, five hundred twenty".