421872624 has 100 divisors (see below), whose sum is σ = 1274199696. Its totient is φ = 134500608.

The previous prime is 421872617. The next prime is 421872673. The reversal of 421872624 is 426278124.

421872624 is a `hidden beast` number, since 4 + 21 + 8 + 7 + 2 + 624 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22732 + ... + 36884.

Almost surely, 2^421872624 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 421872624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (637099848).

421872624 is an abundant number, since it is smaller than the sum of its proper divisors (852327072).

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

421872624 is a wasteful number, since it uses less digits than its factorization.

421872624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14196 (or 14181 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 421872624 is about 20539.5380668602. The cubic root of 421872624 is about 749.9985919974.

The spelling of 421872624 in words is "four hundred twenty-one million, eight hundred seventy-two thousand, six hundred twenty-four".