421008824 has 24 divisors (see below), whose sum is σ = 802601280. Its totient is φ = 207038880.

The previous prime is 421008823. The next prime is 421008827. The reversal of 421008824 is 428800124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421008823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22697 + ... + 36839.

It is an arithmetic number, because the mean of its divisors is an integer number (33441720).

Almost surely, 2^421008824 is an apocalyptic number.

It is an amenable number.

421008824 is a deficient number, since it is larger than the sum of its proper divisors (381592456).

421008824 is a wasteful number, since it uses less digits than its factorization.

421008824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14271 (or 14206 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 421008824 is about 20518.4995552794. The cubic root of 421008824 is about 749.4863588292.

Adding to 421008824 its reverse (428800124), we get a palindrome (849808948).

The spelling of 421008824 in words is "four hundred twenty-one million, eight thousand, eight hundred twenty-four".