384021820040 has 32 divisors (see below), whose sum is σ = 864084375000. Its totient is φ = 153602456064.

The previous prime is 384021820037. The next prime is 384021820069. The reversal of 384021820040 is 40028120483.

It can be written as a sum of positive squares in 4 ways, for example, as 322212899044 + 61808920996 = 567638^2 + 248614^2 .

It is a junction number, because it is equal to n+sod(n) for n = 384021819979 and 384021820006.

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, 867086 + ... + 1232834.

Almost surely, 2^384021820040 is an apocalyptic number.

It is an amenable number.

384021820040 is an abundant number, since it is smaller than the sum of its proper divisors (480062554960).

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

384021820040 is a wasteful number, since it uses less digits than its factorization.

384021820040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392009 (or 392005 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The spelling of 384021820040 in words is "three hundred eighty-four billion, twenty-one million, eight hundred twenty thousand, forty".