1002022400 has 60 divisors (see below), whose sum is σ = 2482620492. Its totient is φ = 400803840.

The previous prime is 1002022387. The next prime is 1002022403. The reversal of 1002022400 is 42202001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002022403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26342 + ... + 51941.

Almost surely, 2^1002022400 is an apocalyptic number.

1002022400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002022400 is an abundant number, since it is smaller than the sum of its proper divisors (1480598092).

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

1002022400 is an frugal number, since it uses more digits than its factorization.

1002022400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78311 (or 78290 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1002022400 is about 31654.7374021646. The cubic root of 1002022400 is about 1000.6736793875.

Adding to 1002022400 its reverse (42202001), we get a palindrome (1044224401).

The spelling of 1002022400 in words is "one billion, two million, twenty-two thousand, four hundred".