1389989700 has 288 divisors, whose sum is σ = 5163419520. Its totient is φ = 317030400.

The previous prime is 1389989639. The next prime is 1389989759. The reversal of 1389989700 is 79899831.

It is a super-2 number, since 2×1389989700² = 3864142732212180000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 503524 + ... + 506276.

It is an arithmetic number, because the mean of its divisors is an integer number (17928540).

Almost surely, 2^1389989700 is an apocalyptic number.

1389989700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389989700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2581709760).

1389989700 is an abundant number, since it is smaller than the sum of its proper divisors (3773429820).

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

1389989700 is a wasteful number, since it uses less digits than its factorization.

1389989700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804 (or 2791 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The square root of 1389989700 is about 37282.5656306000. The cubic root of 1389989700 is about 1116.0162733203.

The spelling of 1389989700 in words is "one billion, three hundred eighty-nine million, nine hundred eighty-nine thousand, seven hundred".