421437888 has 168 divisors, whose sum is σ = 1291425408. Its totient is φ = 130940928.

The previous prime is 421437857. The next prime is 421437923. The reversal of 421437888 is 888734124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1889745 + ... + 1889967.

It is an arithmetic number, because the mean of its divisors is an integer number (7687056).

Almost surely, 2^421437888 is an apocalyptic number.

421437888 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421437888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645712704).

421437888 is an abundant number, since it is smaller than the sum of its proper divisors (869987520).

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

421437888 is a wasteful number, since it uses less digits than its factorization.

421437888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 438 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 421437888 is about 20528.9524330883. The cubic root of 421437888 is about 749.7408811535.

The spelling of 421437888 in words is "four hundred twenty-one million, four hundred thirty-seven thousand, eight hundred eighty-eight".