1002009204 has 120 divisors (see below), whose sum is σ = 3022367040. Its totient is φ = 283544064.

The previous prime is 1002009199. The next prime is 1002009233. The reversal of 1002009204 is 4029002001.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 240612 + ... + 244740.

It is an arithmetic number, because the mean of its divisors is an integer number (25186392).

Almost surely, 2^1002009204 is an apocalyptic number.

1002009204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002009204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1511183520).

1002009204 is an abundant number, since it is smaller than the sum of its proper divisors (2020357836).

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

1002009204 is a wasteful number, since it uses less digits than its factorization.

1002009204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259 (or 4248 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1002009204 is about 31654.5289650628. The cubic root of 1002009204 is about 1000.6692866221.

The spelling of 1002009204 in words is "one billion, two million, nine thousand, two hundred four".