388860880 has 20 divisors (see below), whose sum is σ = 904101732. Its totient is φ = 155544320.

The previous prime is 388860877. The next prime is 388860949. The reversal of 388860880 is 88068883.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 188128656 + 200732224 = 13716^2 + 14168^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2430301 + ... + 2430460.

Almost surely, 2^388860880 is an apocalyptic number.

It is an amenable number.

388860880 is an abundant number, since it is smaller than the sum of its proper divisors (515240852).

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

388860880 is a wasteful number, since it uses less digits than its factorization.

388860880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860774 (or 4860768 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 49.

The square root of 388860880 is about 19719.5557759296. Note that the first 3 decimals coincide. The cubic root of 388860880 is about 729.9023325894.

The spelling of 388860880 in words is "three hundred eighty-eight million, eight hundred sixty thousand, eight hundred eighty".