420768918 has 20 divisors (see below), whose sum is σ = 942834420. Its totient is φ = 140256252.

The previous prime is 420768857. The next prime is 420768919. The reversal of 420768918 is 819867024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420768919) 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 9 ways as a sum of consecutive naturals, for example, 1298508 + ... + 1298831.

It is an arithmetic number, because the mean of its divisors is an integer number (47141721).

Almost surely, 2^420768918 is an apocalyptic number.

420768918 is an abundant number, since it is smaller than the sum of its proper divisors (522065502).

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

420768918 is a wasteful number, since it uses less digits than its factorization.

420768918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597353 (or 2597344 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 420768918 is about 20512.6526319733. The cubic root of 420768918 is about 749.3439703341.

The spelling of 420768918 in words is "four hundred twenty million, seven hundred sixty-eight thousand, nine hundred eighteen".