388944444 has 96 divisors (see below), whose sum is σ = 1111735296. Its totient is φ = 103403520.

The previous prime is 388944443. The next prime is 388944469. The reversal of 388944444 is 444449883.

It is a junction number, because it is equal to n+sod(n) for n = 388944393 and 388944402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388944443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68764 + ... + 74204.

It is an arithmetic number, because the mean of its divisors is an integer number (11580576).

Almost surely, 2^388944444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388944444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555867648).

388944444 is an abundant number, since it is smaller than the sum of its proper divisors (722790852).

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

388944444 is a wasteful number, since it uses less digits than its factorization.

388944444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5515 (or 5513 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 48.

The square root of 388944444 is about 19721.6744725188. The cubic root of 388944444 is about 729.9546128033.

The spelling of 388944444 in words is "three hundred eighty-eight million, nine hundred forty-four thousand, four hundred forty-four".