420342340 has 96 divisors (see below), whose sum is σ = 1027240704. Its totient is φ = 142786560.

The previous prime is 420342271. The next prime is 420342341. The reversal of 420342340 is 43243024.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (420342341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 624244 + ... + 624916.

It is an arithmetic number, because the mean of its divisors is an integer number (10700424).

Almost surely, 2^420342340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420342340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (513620352).

420342340 is an abundant number, since it is smaller than the sum of its proper divisors (606898364).

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

420342340 is a wasteful number, since it uses less digits than its factorization.

420342340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 420342340 is about 20502.2520714189. The cubic root of 420342340 is about 749.0906549380.

Adding to 420342340 its reverse (43243024), we get a palindrome (463585364).

The spelling of 420342340 in words is "four hundred twenty million, three hundred forty-two thousand, three hundred forty".