1002090000 has 100 divisors (see below), whose sum is σ = 3234976976. Its totient is φ = 267216000.

The previous prime is 1002089969. The next prime is 1002090079. The reversal of 1002090000 is 902001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13299 + ... + 46701.

Almost surely, 2^1002090000 is an apocalyptic number.

1002090000 is a gapful number since it is divisible by the number (10) 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 1002090000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1617488488).

1002090000 is an abundant number, since it is smaller than the sum of its proper divisors (2232886976).

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

1002090000 is an equidigital number, since it uses as much as digits as its factorization.

1002090000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33434 (or 33413 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1002090000 is about 31655.8051548211. The cubic root of 1002090000 is about 1000.6961818850.

Adding to 1002090000 its reverse (902001), we get a palindrome (1002992001).

The spelling of 1002090000 in words is "one billion, two million, ninety thousand".