388446344420 has 24 divisors (see below), whose sum is σ = 815757613944. Its totient is φ = 155374672896.

The previous prime is 388446344393. The next prime is 388446344423. The reversal of 388446344420 is 24443644883.

It can be written as a sum of positive squares in 4 ways, for example, as 27723582016 + 360722762404 = 166504^2 + 600602^2 .

It is a super-2 number, since 2×388446344420² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388446344423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665714 + ... + 1104566.

It is an arithmetic number, because the mean of its divisors is an integer number (33989900581).

Almost surely, 2^388446344420 is an apocalyptic number.

It is an amenable number.

388446344420 is an abundant number, since it is smaller than the sum of its proper divisors (427311269524).

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

388446344420 is a wasteful number, since it uses less digits than its factorization.

388446344420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483119 (or 483117 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 50.

The spelling of 388446344420 in words is "three hundred eighty-eight billion, four hundred forty-six million, three hundred forty-four thousand, four hundred twenty".