388533880 has 128 divisors (see below), whose sum is σ = 1052352000. Its totient is φ = 126282240.

The previous prime is 388533829. The next prime is 388533883. The reversal of 388533880 is 88335883.

It is a self number, because there is not a number n which added to its sum of digits gives 388533880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388533883) 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, 478675 + ... + 479485.

It is an arithmetic number, because the mean of its divisors is an integer number (8221500).

Almost surely, 2^388533880 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 388533880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526176000).

388533880 is an abundant number, since it is smaller than the sum of its proper divisors (663818120).

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

388533880 is a wasteful number, since it uses less digits than its factorization.

388533880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 388533880 is about 19711.2627703047. The cubic root of 388533880 is about 729.6976792809.

The spelling of 388533880 in words is "three hundred eighty-eight million, five hundred thirty-three thousand, eight hundred eighty".