420935906 has 8 divisors (see below), whose sum is σ = 632240220. Its totient is φ = 210189168.

The previous prime is 420935849. The next prime is 420935917. The reversal of 420935906 is 609539024.

It can be written as a sum of positive squares in 2 ways, for example, as 411724681 + 9211225 = 20291^2 + 3035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 420935906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137501 + ... + 140528.

Almost surely, 2^420935906 is an apocalyptic number.

420935906 is a deficient number, since it is larger than the sum of its proper divisors (211304314).

420935906 is a wasteful number, since it uses less digits than its factorization.

420935906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278788.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 420935906 is about 20516.7225940207. The cubic root of 420935906 is about 749.4430864172.

The spelling of 420935906 in words is "four hundred twenty million, nine hundred thirty-five thousand, nine hundred six".