421978819284 has 72 divisors (see below), whose sum is σ = 1192020036480. Its totient is φ = 124753526400.

The previous prime is 421978819277. The next prime is 421978819333. The reversal of 421978819284 is 482918879124.

It is a super-2 number, since 2×421978819284² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12978924 + ... + 13011395.

It is an arithmetic number, because the mean of its divisors is an integer number (16555833840).

Almost surely, 2^421978819284 is an apocalyptic number.

421978819284 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

421978819284 is an abundant number, since it is smaller than the sum of its proper divisors (770041217196).

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

421978819284 is a wasteful number, since it uses less digits than its factorization.

421978819284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25990381 (or 25990376 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 63.

The spelling of 421978819284 in words is "four hundred twenty-one billion, nine hundred seventy-eight million, eight hundred nineteen thousand, two hundred eighty-four".