1040020002 has 72 divisors (see below), whose sum is σ = 2650927500. Its totient is φ = 293787648.

The previous prime is 1040020001. The next prime is 1040020057. The reversal of 1040020002 is 2000200401.

It can be written as a sum of positive squares in 2 ways, for example, as 954253881 + 85766121 = 30891^2 + 9261^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1040020001) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 71874 + ... + 85122.

Almost surely, 2^1040020002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1040020002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325463750).

1040020002 is an abundant number, since it is smaller than the sum of its proper divisors (1610907498).

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

1040020002 is a wasteful number, since it uses less digits than its factorization.

1040020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13360 (or 13350 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1040020002 is about 32249.3411095483. The cubic root of 1040020002 is about 1013.1658990396.

Adding to 1040020002 its reverse (2000200401), we get a palindrome (3040220403).

The spelling of 1040020002 in words is "one billion, forty million, twenty thousand, two".