1002636 has 18 divisors (see below), whose sum is σ = 2534532. Its totient is φ = 334200.

The previous prime is 1002623. The next prime is 1002647. The reversal of 1002636 is 6362001.

It is a happy number.

1002636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 13890 + ... + 13961.

2^1002636 is an apocalyptic number.

It is an amenable number.

1002636 is an abundant number, since it is smaller than the sum of its proper divisors (1531896).

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

1002636 is a wasteful number, since it uses less digits than its factorization.

1002636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27861 (or 27856 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1002636 is about 1001.3171325809. The cubic root of 1002636 is about 100.0877895740.

Adding to 1002636 its reverse (6362001), we get a palindrome (7364637).

The spelling of 1002636 in words is "one million, two thousand, six hundred thirty-six".