388247616 has 63 divisors (see below), whose sum is σ = 1114198813. Its totient is φ = 129258240.

The previous prime is 388247611. The next prime is 388247669. The reversal of 388247616 is 616742883.

The square root of 388247616 is 19704.

It is a perfect power (a square), and thus also a powerful number.

388247616 is a `hidden beast` number, since 3 + 8 + 8 + 24 + 7 + 616 = 666.

It can be written as a sum of positive squares in only one way, i.e., 106007616 + 282240000 = 10296^2 + 16800^2 .

It is a super-2 number, since 2×388247616² = 301472422659366912, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388247611) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 472486 + ... + 473306.

Almost surely, 2^388247616 is an apocalyptic number.

388247616 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

388247616 is the 19704-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388247616

388247616 is an abundant number, since it is smaller than the sum of its proper divisors (725951197).

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

388247616 is an frugal number, since it uses more digits than its factorization.

388247616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660 (or 826 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The cubic root of 388247616 is about 729.5184263601.

It can be divided in two parts, 388 and 247616, that added together give a square (248004 = 498²).

The spelling of 388247616 in words is "three hundred eighty-eight million, two hundred forty-seven thousand, six hundred sixteen".