393069821420 has 24 divisors (see below), whose sum is σ = 825973459584. Its totient is φ = 157127579136.

The previous prime is 393069821401. The next prime is 393069821461. The reversal of 393069821420 is 24128960393.

It is a super-2 number, since 2×393069821420² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6239717 + ... + 6302396.

It is an arithmetic number, because the mean of its divisors is an integer number (34415560816).

Almost surely, 2^393069821420 is an apocalyptic number.

It is an amenable number.

393069821420 is an abundant number, since it is smaller than the sum of its proper divisors (432903638164).

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

393069821420 is a wasteful number, since it uses less digits than its factorization.

393069821420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12543689 (or 12543687 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 393069821420 in words is "three hundred ninety-three billion, sixty-nine million, eight hundred twenty-one thousand, four hundred twenty".