388889800 has 96 divisors (see below), whose sum is σ = 978765480. Its totient is φ = 142848000.

The previous prime is 388889783. The next prime is 388889821. The reversal of 388889800 is 8988883.

It can be written as a sum of positive squares in 12 ways, for example, as 64673764 + 324216036 = 8042^2 + 18006^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 969600 + ... + 970000.

Almost surely, 2^388889800 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 388889800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489382740).

388889800 is an abundant number, since it is smaller than the sum of its proper divisors (589875680).

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

388889800 is a wasteful number, since it uses less digits than its factorization.

388889800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 52.

The square root of 388889800 is about 19720.2890445348. The cubic root of 388889800 is about 729.9204266802.

The spelling of 388889800 in words is "three hundred eighty-eight million, eight hundred eighty-nine thousand, eight hundred".