420844836 has 24 divisors (see below), whose sum is σ = 989470944. Its totient is φ = 139210240.

The previous prime is 420844829. The next prime is 420844847. The reversal of 420844836 is 638448024.

It is a super-2 number, since 2×420844836² = 354220751975733792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420844794 and 420844803.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132285 + ... + 135428.

It is an arithmetic number, because the mean of its divisors is an integer number (41227956).

Almost surely, 2^420844836 is an apocalyptic number.

It is an amenable number.

420844836 is an abundant number, since it is smaller than the sum of its proper divisors (568626108).

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

420844836 is a wasteful number, since it uses less digits than its factorization.

420844836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267851 (or 267849 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 39.

The square root of 420844836 is about 20514.5030649051. The cubic root of 420844836 is about 749.3890348751.

The spelling of 420844836 in words is "four hundred twenty million, eight hundred forty-four thousand, eight hundred thirty-six".