1000388885 has 8 divisors (see below), whose sum is σ = 1271082456. Its totient is φ = 753233920.

The previous prime is 1000388819. The next prime is 1000388891. The reversal of 1000388885 is 5888830001.

It is a happy number.

1000388885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 425060689 + 575328196 = 20617^2 + 23986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1000388885 - 2¹⁶ = 1000323349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5884556 + ... + 5884725.

It is an arithmetic number, because the mean of its divisors is an integer number (158885307).

Almost surely, 2^1000388885 is an apocalyptic number.

It is an amenable number.

1000388885 is a deficient number, since it is larger than the sum of its proper divisors (270693571).

1000388885 is a wasteful number, since it uses less digits than its factorization.

1000388885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11769303.

The product of its (nonzero) digits is 61440, while the sum is 41.

The square root of 1000388885 is about 31628.9248157442. The cubic root of 1000388885 is about 1000.1296115335.

The spelling of 1000388885 in words is "one billion, three hundred eighty-eight thousand, eight hundred eighty-five".