420388386 has 32 divisors (see below), whose sum is σ = 921181248. Its totient is φ = 126839040.

The previous prime is 420388343. The next prime is 420388391. The reversal of 420388386 is 683883024.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 1710 + ... + 29046.

It is an arithmetic number, because the mean of its divisors is an integer number (28786914).

Almost surely, 2^420388386 is an apocalyptic number.

420388386 is an abundant number, since it is smaller than the sum of its proper divisors (500792862).

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

420388386 is a wasteful number, since it uses less digits than its factorization.

420388386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27586.

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 420388386 is about 20503.3749904741. The cubic root of 420388386 is about 749.1180067460.

The spelling of 420388386 in words is "four hundred twenty million, three hundred eighty-eight thousand, three hundred eighty-six".