388920980 has 48 divisors (see below), whose sum is σ = 937364736. Its totient is φ = 132779520.

The previous prime is 388920977. The next prime is 388920989. The reversal of 388920980 is 89029883.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388920989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27977 + ... + 39503.

It is an arithmetic number, because the mean of its divisors is an integer number (19528432).

Almost surely, 2^388920980 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 388920980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468682368).

388920980 is an abundant number, since it is smaller than the sum of its proper divisors (548443756).

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

388920980 is a wasteful number, since it uses less digits than its factorization.

388920980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11784 (or 11782 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 388920980 is about 19721.0795850531. The cubic root of 388920980 is about 729.9399337579.

The spelling of 388920980 in words is "three hundred eighty-eight million, nine hundred twenty thousand, nine hundred eighty".