1389656480 has 48 divisors (see below), whose sum is σ = 3296238624. Its totient is φ = 553632000.

The previous prime is 1389656459. The next prime is 1389656497. The reversal of 1389656480 is 846569831.

It is a super-3 number, since 3×1389656480³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22859 + ... + 57461.

It is an arithmetic number, because the mean of its divisors is an integer number (68671638).

Almost surely, 2^1389656480 is an apocalyptic number.

1389656480 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 1389656480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1648119312).

1389656480 is an abundant number, since it is smaller than the sum of its proper divisors (1906582144).

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

1389656480 is a wasteful number, since it uses less digits than its factorization.

1389656480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34869 (or 34861 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 1389656480 is about 37278.0965179286. The cubic root of 1389656480 is about 1115.9270859297.

The spelling of 1389656480 in words is "one billion, three hundred eighty-nine million, six hundred fifty-six thousand, four hundred eighty".