1389664548 has 18 divisors (see below), whose sum is σ = 3512763254. Its totient is φ = 463221504.

The previous prime is 1389664513. The next prime is 1389664553. The reversal of 1389664548 is 8454669831.

1389664548 is a `hidden beast` number, since 1 + 3 + 8 + 96 + 6 + 4 + 548 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1290821184 + 98843364 = 35928^2 + 9942^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 1389664494 and 1389664503.

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 5 ways as a sum of consecutive naturals, for example, 19300861 + ... + 19300932.

Almost surely, 2^1389664548 is an apocalyptic number.

1389664548 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1389664548 is an abundant number, since it is smaller than the sum of its proper divisors (2123098706).

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

1389664548 is a wasteful number, since it uses less digits than its factorization.

1389664548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38601803 (or 38601798 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 1389664548 is about 37278.2047314513. The cubic root of 1389664548 is about 1115.9292455239.

The spelling of 1389664548 in words is "one billion, three hundred eighty-nine million, six hundred sixty-four thousand, five hundred forty-eight".