388989556 has 6 divisors (see below), whose sum is σ = 680731730. Its totient is φ = 194494776.

The previous prime is 388989553. The next prime is 388989577. The reversal of 388989556 is 655989883.

It can be written as a sum of positive squares in only one way, i.e., 287302500 + 101687056 = 16950^2 + 10084^2 .

It is a junction number, because it is equal to n+sod(n) for n = 388989494 and 388989503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388989551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48623691 + ... + 48623698.

Almost surely, 2^388989556 is an apocalyptic number.

It is an amenable number.

388989556 is a deficient number, since it is larger than the sum of its proper divisors (291742174).

388989556 is a wasteful number, since it uses less digits than its factorization.

388989556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97247393 (or 97247391 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 61.

The square root of 388989556 is about 19722.8181556288. The cubic root of 388989556 is about 729.9828331486.

The spelling of 388989556 in words is "three hundred eighty-eight million, nine hundred eighty-nine thousand, five hundred fifty-six".