421601838 has 16 divisors (see below), whose sum is σ = 963661440. Its totient is φ = 120457656.

The previous prime is 421601837. The next prime is 421601857. The reversal of 421601838 is 838106124.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 421601799 and 421601808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421601837) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5019028 + ... + 5019111.

It is an arithmetic number, because the mean of its divisors is an integer number (60228840).

Almost surely, 2^421601838 is an apocalyptic number.

421601838 is an abundant number, since it is smaller than the sum of its proper divisors (542059602).

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

421601838 is a wasteful number, since it uses less digits than its factorization.

421601838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10038151.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 421601838 is about 20532.9451857253. The cubic root of 421601838 is about 749.8380912722.

The spelling of 421601838 in words is "four hundred twenty-one million, six hundred one thousand, eight hundred thirty-eight".