388947996 has 72 divisors (see below), whose sum is σ = 1019556720. Its totient is φ = 124920576.

The previous prime is 388947953. The next prime is 388948003. The reversal of 388947996 is 699749883.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141160 + ... + 143888.

It is an arithmetic number, because the mean of its divisors is an integer number (14160510).

Almost surely, 2^388947996 is an apocalyptic number.

388947996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388947996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (509778360).

388947996 is an abundant number, since it is smaller than the sum of its proper divisors (630608724).

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

388947996 is a wasteful number, since it uses less digits than its factorization.

388947996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883 (or 2878 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 388947996 is about 19721.7645255185. The cubic root of 388947996 is about 729.9568348781.

The spelling of 388947996 in words is "three hundred eighty-eight million, nine hundred forty-seven thousand, nine hundred ninety-six".