1389954384 has 240 divisors, whose sum is σ = 4999055040. Its totient is φ = 366508800.

The previous prime is 1389954373. The next prime is 1389954389. The reversal of 1389954384 is 4834599831.

1389954384 is a `hidden beast` number, since 1 + 3 + 8 + 99 + 543 + 8 + 4 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1389954384.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389954389) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 272659 + ... + 277709.

It is an arithmetic number, because the mean of its divisors is an integer number (20829396).

Almost surely, 2^1389954384 is an apocalyptic number.

1389954384 is a gapful number since it is divisible by the number (14) 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 1389954384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2499527520).

1389954384 is an abundant number, since it is smaller than the sum of its proper divisors (3609100656).

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

1389954384 is a wasteful number, since it uses less digits than its factorization.

1389954384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5095 (or 5076 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 1389954384 is about 37282.0920013885. The cubic root of 1389954384 is about 1116.0068215562.

The spelling of 1389954384 in words is "one billion, three hundred eighty-nine million, nine hundred fifty-four thousand, three hundred eighty-four".