340404021420 has 48 divisors (see below), whose sum is σ = 955532161248. Its totient is φ = 90545748480.

The previous prime is 340404021407. The next prime is 340404021431. The reversal of 340404021420 is 24120404043.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7121521 + ... + 7169160.

It is an arithmetic number, because the mean of its divisors is an integer number (19906920026).

Almost surely, 2^340404021420 is an apocalyptic number.

340404021420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

340404021420 is an abundant number, since it is smaller than the sum of its proper divisors (615128139828).

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

340404021420 is a wasteful number, since it uses less digits than its factorization.

340404021420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14291090 (or 14291088 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 340404021420 its reverse (24120404043), we get a palindrome (364524425463).

The spelling of 340404021420 in words is "three hundred forty billion, four hundred four million, twenty-one thousand, four hundred twenty".