340442420 has 24 divisors (see below), whose sum is σ = 715438248. Its totient is φ = 136080000.

The previous prime is 340442419. The next prime is 340442429. The reversal of 340442420 is 24244043.

It can be written as a sum of positive squares in 4 ways, for example, as 41705764 + 298736656 = 6458^2 + 17284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340442429) 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, 27170 + ... + 37670.

It is an arithmetic number, because the mean of its divisors is an integer number (29809927).

Almost surely, 2^340442420 is an apocalyptic number.

It is an amenable number.

340442420 is an abundant number, since it is smaller than the sum of its proper divisors (374995828).

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

340442420 is a wasteful number, since it uses less digits than its factorization.

340442420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12131 (or 12129 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 340442420 is about 18451.0818111026. The cubic root of 340442420 is about 698.2558072576.

Adding to 340442420 its reverse (24244043), we get a palindrome (364686463).

The spelling of 340442420 in words is "three hundred forty million, four hundred forty-two thousand, four hundred twenty".