340043420 has 24 divisors (see below), whose sum is σ = 714470064. Its totient is φ = 135945216.

The previous prime is 340043387. The next prime is 340043423. The reversal of 340043420 is 24340043.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 340043392 and 340043401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340043423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50492 + ... + 56828.

It is an arithmetic number, because the mean of its divisors is an integer number (29769586).

Almost surely, 2^340043420 is an apocalyptic number.

It is an amenable number.

340043420 is an abundant number, since it is smaller than the sum of its proper divisors (374426644).

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

340043420 is a wasteful number, since it uses less digits than its factorization.

340043420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9029 (or 9027 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 340043420 is about 18440.2662670581. The cubic root of 340043420 is about 697.9829143362.

Adding to 340043420 its reverse (24340043), we get a palindrome (364383463).

The spelling of 340043420 in words is "three hundred forty million, forty-three thousand, four hundred twenty".