1389343536 has 160 divisors (see below), whose sum is σ = 4797708800. Its totient is φ = 376047360.

The previous prime is 1389343499. The next prime is 1389343541. The reversal of 1389343536 is 6353439831.

1389343536 is a `hidden beast` number, since 1 + 3 + 89 + 34 + 3 + 536 = 666.

It is a super-2 number, since 2×1389343536² = 3860550922049966592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1389343491 and 1389343500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45366 + ... + 69546.

It is an arithmetic number, because the mean of its divisors is an integer number (29985680).

Almost surely, 2^1389343536 is an apocalyptic number.

1389343536 is a gapful number since it is divisible by the number (16) 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 1389343536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2398854400).

1389343536 is an abundant number, since it is smaller than the sum of its proper divisors (3408365264).

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

1389343536 is a wasteful number, since it uses less digits than its factorization.

1389343536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24224 (or 24212 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 1389343536 is about 37273.8988569750. The cubic root of 1389343536 is about 1115.8433124915.

The spelling of 1389343536 in words is "one billion, three hundred eighty-nine million, three hundred forty-three thousand, five hundred thirty-six".