421443000 has 480 divisors, whose sum is σ = 1656935280. Its totient is φ = 99792000.

The previous prime is 421442969. The next prime is 421443049. The reversal of 421443000 is 344124.

It is a super-2 number, since 2×421443000² = 355228404498000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 9800979 + ... + 9801021.

Almost surely, 2^421443000 is an apocalyptic number.

421443000 is a gapful number since it is divisible by the number (40) 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 421443000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828467640).

421443000 is an abundant number, since it is smaller than the sum of its proper divisors (1235492280).

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

421443000 is a wasteful number, since it uses less digits than its factorization.

421443000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 421443000 is about 20529.0769397944. The cubic root of 421443000 is about 749.7439125689.

Adding to 421443000 its reverse (344124), we get a palindrome (421787124).

The spelling of 421443000 in words is "four hundred twenty-one million, four hundred forty-three thousand".