1237989000 has 64 divisors (see below), whose sum is σ = 3862535040. Its totient is φ = 330129600.

The previous prime is 1237988993. The next prime is 1237989041. The reversal of 1237989000 is 9897321.

It is a self number, because there is not a number n which added to its sum of digits gives 1237989000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203332 + ... + 209331.

It is an arithmetic number, because the mean of its divisors is an integer number (60352110).

Almost surely, 2^1237989000 is an apocalyptic number.

1237989000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1237989000 is an abundant number, since it is smaller than the sum of its proper divisors (2624546040).

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

1237989000 is a wasteful number, since it uses less digits than its factorization.

1237989000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412687 (or 412673 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 1237989000 is about 35185.0678555549. The cubic root of 1237989000 is about 1073.7559793636.

The spelling of 1237989000 in words is "one billion, two hundred thirty-seven million, nine hundred eighty-nine thousand".