421387238624 has 96 divisors (see below), whose sum is σ = 949270420224. Its totient is φ = 182261882880.

The previous prime is 421387238581. The next prime is 421387238651. The reversal of 421387238624 is 426832783124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1427687 + ... + 1697369.

It is an arithmetic number, because the mean of its divisors is an integer number (9888233544).

Almost surely, 2^421387238624 is an apocalyptic number.

421387238624 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421387238624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474635210112).

421387238624 is an abundant number, since it is smaller than the sum of its proper divisors (527883181600).

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

421387238624 is a wasteful number, since it uses less digits than its factorization.

421387238624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269920 (or 269912 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 50.

The spelling of 421387238624 in words is "four hundred twenty-one billion, three hundred eighty-seven million, two hundred thirty-eight thousand, six hundred twenty-four".