1009988 has 18 divisors (see below), whose sum is σ = 2056446. Its totient is φ = 432768.

The previous prime is 1009963. The next prime is 1009991. The reversal of 1009988 is 8899001.

It is a happy number.

1009988 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 only one way, i.e., 906304 + 103684 = 952^2 + 322^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2381 + ... + 2772.

It is an arithmetic number, because the mean of its divisors is an integer number (114247).

2^1009988 is an apocalyptic number.

It is an amenable number.

1009988 is an abundant number, since it is smaller than the sum of its proper divisors (1046458).

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

1009988 is a wasteful number, since it uses less digits than its factorization.

1009988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171 (or 5162 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1009988 is about 1004.9815918712. The cubic root of 1009988 is about 100.3318309973.

The spelling of 1009988 in words is "one million, nine thousand, nine hundred eighty-eight".