421456938 has 24 divisors (see below), whose sum is σ = 980533152. Its totient is φ = 120416184.

The previous prime is 421456909. The next prime is 421456939. The reversal of 421456938 is 839654124.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 421456938.

It is not an unprimeable number, because it can be changed into a prime (421456939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 716470 + ... + 717057.

It is an arithmetic number, because the mean of its divisors is an integer number (40855548).

Almost surely, 2^421456938 is an apocalyptic number.

421456938 is an abundant number, since it is smaller than the sum of its proper divisors (559076214).

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

421456938 is a wasteful number, since it uses less digits than its factorization.

421456938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433546 (or 1433539 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 421456938 is about 20529.4164067077. The cubic root of 421456938 is about 749.7521776767.

The spelling of 421456938 in words is "four hundred twenty-one million, four hundred fifty-six thousand, nine hundred thirty-eight".