388285656 has 64 divisors (see below), whose sum is σ = 1066176000. Its totient is φ = 116860800.

The previous prime is 388285643. The next prime is 388285663. The reversal of 388285656 is 656582883.

It is a junction number, because it is equal to n+sod(n) for n = 388285599 and 388285608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34401 + ... + 44271.

It is an arithmetic number, because the mean of its divisors is an integer number (16659000).

Almost surely, 2^388285656 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 388285656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (533088000).

388285656 is an abundant number, since it is smaller than the sum of its proper divisors (677890344).

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

388285656 is a wasteful number, since it uses less digits than its factorization.

388285656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10040 (or 10036 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 51.

The square root of 388285656 is about 19704.9652625931. The cubic root of 388285656 is about 729.5422513397.

The spelling of 388285656 in words is "three hundred eighty-eight million, two hundred eighty-five thousand, six hundred fifty-six".