1389006648 has 24 divisors (see below), whose sum is σ = 3761893200. Its totient is φ = 463002192.

The previous prime is 1389006637. The next prime is 1389006659. The reversal of 1389006648 is 8466009831.

It is an interprime number because it is at equal distance from previous prime (1389006637) and next prime (1389006659).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9645808 + ... + 9645951.

It is an arithmetic number, because the mean of its divisors is an integer number (156745550).

Almost surely, 2^1389006648 is an apocalyptic number.

1389006648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1389006648 is an abundant number, since it is smaller than the sum of its proper divisors (2372886552).

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

1389006648 is a wasteful number, since it uses less digits than its factorization.

1389006648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19291771 (or 19291764 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1389006648 is about 37269.3794957737. The cubic root of 1389006648 is about 1115.7531153108.

The spelling of 1389006648 in words is "one billion, three hundred eighty-nine million, six thousand, six hundred forty-eight".