420336740 has 12 divisors (see below), whose sum is σ = 882707196. Its totient is φ = 168134688.

The previous prime is 420336731. The next prime is 420336773. The reversal of 420336740 is 47633024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 242861056 + 177475684 = 15584^2 + 13322^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10508399 + ... + 10508438.

It is an arithmetic number, because the mean of its divisors is an integer number (73558933).

Almost surely, 2^420336740 is an apocalyptic number.

It is an amenable number.

420336740 is an abundant number, since it is smaller than the sum of its proper divisors (462370456).

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

420336740 is a wasteful number, since it uses less digits than its factorization.

420336740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21016846 (or 21016844 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 420336740 is about 20502.1155006014. The cubic root of 420336740 is about 749.0873283430.

Adding to 420336740 its reverse (47633024), we get a palindrome (467969764).

The spelling of 420336740 in words is "four hundred twenty million, three hundred thirty-six thousand, seven hundred forty".