421845900 has 108 divisors (see below), whose sum is σ = 1419862248. Its totient is φ = 96418560.

The previous prime is 421845883. The next prime is 421845901. The reversal of 421845900 is 9548124.

It is not an unprimeable number, because it can be changed into a prime (421845901) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 352 + ... + 29048.

Almost surely, 2^421845900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421845900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (709931124).

421845900 is an abundant number, since it is smaller than the sum of its proper divisors (998016348).

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

421845900 is a wasteful number, since it uses less digits than its factorization.

421845900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28728 (or 28714 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 421845900 is about 20538.8875063865. The cubic root of 421845900 is about 749.9827551590.

It can be divided in two parts, 42184 and 5900, that added together give a palindrome (48084).

The spelling of 421845900 in words is "four hundred twenty-one million, eight hundred forty-five thousand, nine hundred".