421718544 has 240 divisors, whose sum is σ = 1350469120. Its totient is φ = 122653440.

The previous prime is 421718533. The next prime is 421718567. The reversal of 421718544 is 445817124.

It is a happy number.

421718544 is a `hidden beast` number, since 42 + 1 + 71 + 8 + 544 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 421718499 and 421718508.

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, 9807387 + ... + 9807429.

Almost surely, 2^421718544 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 421718544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (675234560).

421718544 is an abundant number, since it is smaller than the sum of its proper divisors (928750576).

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

421718544 is a wasteful number, since it uses less digits than its factorization.

421718544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 92 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 421718544 is about 20535.7869096852. The cubic root of 421718544 is about 749.9072738696.

The spelling of 421718544 in words is "four hundred twenty-one million, seven hundred eighteen thousand, five hundred forty-four".