421026624 has 336 divisors, whose sum is σ = 1407444480. Its totient is φ = 119439360.

The previous prime is 421026583. The next prime is 421026637. The reversal of 421026624 is 426620124.

421026624 is a `hidden beast` number, since 4 + 2 + 10 + 26 + 624 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5767452 + ... + 5767524.

Almost surely, 2^421026624 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 421026624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (703722240).

421026624 is an abundant number, since it is smaller than the sum of its proper divisors (986417856).

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

421026624 is a wasteful number, since it uses less digits than its factorization.

421026624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 421026624 is about 20518.9333056083. The cubic root of 421026624 is about 749.4969212912.

Adding to 421026624 its reverse (426620124), we get a palindrome (847646748).

The spelling of 421026624 in words is "four hundred twenty-one million, twenty-six thousand, six hundred twenty-four".