1002821436 has 72 divisors (see below), whose sum is σ = 2650056864. Its totient is φ = 319144320.

The previous prime is 1002821399. The next prime is 1002821437. The reversal of 1002821436 is 6341282001.

It is a super-2 number, since 2×1002821436² = 2011301665002204192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002821437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 725466 + ... + 726846.

Almost surely, 2^1002821436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002821436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325028432).

1002821436 is an abundant number, since it is smaller than the sum of its proper divisors (1647235428).

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

1002821436 is a wasteful number, since it uses less digits than its factorization.

1002821436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291 (or 2286 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1002821436 is about 31667.3559995147. The cubic root of 1002821436 is about 1000.9395955504.

The spelling of 1002821436 in words is "one billion, two million, eight hundred twenty-one thousand, four hundred thirty-six".