321428324338560 has 224 divisors, whose sum is σ = 1152094850155080. Its totient is φ = 85714219699200.

The previous prime is 321428324338519. The next prime is 321428324338571. The reversal of 321428324338560 is 65833423824123.

321428324338560 is a `hidden beast` number, since 3 + 2 + 1 + 4 + 2 + 8 + 3 + 2 + 43 + 38 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 321428324338497 and 321428324338506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 343999666 + ... + 344932785.

Almost surely, 2^{321428324338560} is an apocalyptic number.

321428324338560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321428324338560 is an abundant number, since it is smaller than the sum of its proper divisors (830666525816520).

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

321428324338560 is an frugal number, since it uses more digits than its factorization.

321428324338560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688932488 (or 688932461 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 54.

The spelling of 321428324338560 in words is "three hundred twenty-one trillion, four hundred twenty-eight billion, three hundred twenty-four million, three hundred thirty-eight thousand, five hundred sixty".