340342123440 has 80 divisors (see below), whose sum is σ = 1150975190016. Its totient is φ = 82507180800.

The previous prime is 340342123427. The next prime is 340342123577. The reversal of 340342123440 is 44321243043.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 340342123398 and 340342123407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64456096 + ... + 64461375.

Almost surely, 2^340342123440 is an apocalyptic number.

340342123440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

340342123440 is an abundant number, since it is smaller than the sum of its proper divisors (810633066576).

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

340342123440 is a wasteful number, since it uses less digits than its factorization.

340342123440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128917498 (or 128917492 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 340342123440 its reverse (44321243043), we get a palindrome (384663366483).

The spelling of 340342123440 in words is "three hundred forty billion, three hundred forty-two million, one hundred twenty-three thousand, four hundred forty".