421920836 has 12 divisors (see below), whose sum is σ = 739776912. Its totient is φ = 210556008.

The previous prime is 421920817. The next prime is 421920839. The reversal of 421920836 is 638029124.

It is a junction number, because it is equal to n+sod(n) for n = 421920796 and 421920805.

It is not an unprimeable number, because it can be changed into a prime (421920839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98750 + ... + 102933.

It is an arithmetic number, because the mean of its divisors is an integer number (61648076).

Almost surely, 2^421920836 is an apocalyptic number.

It is an amenable number.

421920836 is a deficient number, since it is larger than the sum of its proper divisors (317856076).

421920836 is a wasteful number, since it uses less digits than its factorization.

421920836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202210 (or 202208 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 421920836 is about 20540.7116721890. The cubic root of 421920836 is about 750.0271610904.

The spelling of 421920836 in words is "four hundred twenty-one million, nine hundred twenty thousand, eight hundred thirty-six".