1002188120 has 32 divisors (see below), whose sum is σ = 2258025120. Its totient is φ = 400323840.

The previous prime is 1002188087. The next prime is 1002188123. The reversal of 1002188120 is 218812001.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002188123) 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 7 ways as a sum of consecutive naturals, for example, 12860 + ... + 46580.

It is an arithmetic number, because the mean of its divisors is an integer number (70563285).

Almost surely, 2^1002188120 is an apocalyptic number.

1002188120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002188120 is an abundant number, since it is smaller than the sum of its proper divisors (1255837000).

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

1002188120 is a wasteful number, since it uses less digits than its factorization.

1002188120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34475 (or 34471 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 1002188120 is about 31657.3549116157. The cubic root of 1002188120 is about 1000.7288419936.

The spelling of 1002188120 in words is "one billion, two million, one hundred eighty-eight thousand, one hundred twenty".