421889688 has 128 divisors (see below), whose sum is σ = 1313280000. Its totient is φ = 124364160.

The previous prime is 421889639. The next prime is 421889711. The reversal of 421889688 is 886988124.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85513 + ... + 90311.

It is an arithmetic number, because the mean of its divisors is an integer number (10260000).

Almost surely, 2^421889688 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 421889688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656640000).

421889688 is an abundant number, since it is smaller than the sum of its proper divisors (891390312).

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

421889688 is a wasteful number, since it uses less digits than its factorization.

421889688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862 (or 4852 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 54.

The square root of 421889688 is about 20539.9534566172. The cubic root of 421889688 is about 750.0087038990.

The spelling of 421889688 in words is "four hundred twenty-one million, eight hundred eighty-nine thousand, six hundred eighty-eight".