340020 has 36 divisors (see below), whose sum is σ = 1031940. Its totient is φ = 90624.

The previous prime is 340007. The next prime is 340027. The reversal of 340020 is 20043.

340020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 142884 + 197136 = 378^2 + 444^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×340020² = 231227200800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 339984 and 340011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340027) by changing a digit.

340020 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 11 ways as a sum of consecutive naturals, for example, 765 + ... + 1124.

It is an arithmetic number, because the mean of its divisors is an integer number (28665).

2³⁴⁰⁰²⁰ is an apocalyptic number.

340020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

340020 is an abundant number, since it is smaller than the sum of its proper divisors (691920).

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

340020 is a wasteful number, since it uses less digits than its factorization.

340020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904 (or 1899 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 340020 is about 583.1123390908. The cubic root of 340020 is about 69.7966889780.

Adding to 340020 its reverse (20043), we get a palindrome (360063).

The spelling of 340020 in words is "three hundred forty thousand, twenty", and thus it is an iban number.