421638607284 has 12 divisors (see below), whose sum is σ = 983823417024. Its totient is φ = 140546202424.

The previous prime is 421638607283. The next prime is 421638607333. The reversal of 421638607284 is 482706836124.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421638607283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17568275292 + ... + 17568275315.

It is an arithmetic number, because the mean of its divisors is an integer number (81985284752).

Almost surely, 2^421638607284 is an apocalyptic number.

It is an amenable number.

421638607284 is an abundant number, since it is smaller than the sum of its proper divisors (562184809740).

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

421638607284 is a wasteful number, since it uses less digits than its factorization.

421638607284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35136550614 (or 35136550612 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 51.

The spelling of 421638607284 in words is "four hundred twenty-one billion, six hundred thirty-eight million, six hundred seven thousand, two hundred eighty-four".