1001388 has 12 divisors (see below), whose sum is σ = 2336600. Its totient is φ = 333792.

The previous prime is 1001387. The next prime is 1001389. The reversal of 1001388 is 8831001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1001387) and next prime (1001389).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1001381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41713 + ... + 41736.

2^1001388 is an apocalyptic number.

It is an amenable number.

1001388 is an abundant number, since it is smaller than the sum of its proper divisors (1335212).

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

1001388 is a wasteful number, since it uses less digits than its factorization.

1001388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83456 (or 83454 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 1001388 is about 1000.6937593490. The cubic root of 1001388 is about 100.0462452771.

Adding to 1001388 its reverse (8831001), we get a palindrome (9832389).

It can be divided in two parts, 10013 and 88, that added together give a palindrome (10101).

The spelling of 1001388 in words is "one million, one thousand, three hundred eighty-eight".