1002011840 has 112 divisors (see below), whose sum is σ = 2439253440. Its totient is φ = 391987200.

The previous prime is 1002011783. The next prime is 1002011849. The reversal of 1002011840 is 481102001.

It is not an unprimeable number, because it can be changed into a prime (1002011849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4300364 + ... + 4300596.

Almost surely, 2^1002011840 is an apocalyptic number.

1002011840 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 1002011840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1219626720).

1002011840 is an abundant number, since it is smaller than the sum of its proper divisors (1437241600).

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

1002011840 is a wasteful number, since it uses less digits than its factorization.

1002011840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1002011840 is about 31654.5706020473. The cubic root of 1002011840 is about 1000.6701641131.

Adding to 1002011840 its reverse (481102001), we get a palindrome (1483113841).

The spelling of 1002011840 in words is "one billion, two million, eleven thousand, eight hundred forty".