1389663744 has 160 divisors (see below), whose sum is σ = 4254894336. Its totient is φ = 394813440.

The previous prime is 1389663733. The next prime is 1389663767. The reversal of 1389663744 is 4473669831.

Its product of digits (2612736) is a multiple of the sum of its prime factors (756).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3300654 + ... + 3301074.

Almost surely, 2^1389663744 is an apocalyptic number.

1389663744 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 1389663744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2127447168).

1389663744 is an abundant number, since it is smaller than the sum of its proper divisors (2865230592).

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

1389663744 is an equidigital number, since it uses as much as digits as its factorization.

1389663744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 740 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 51.

The square root of 1389663744 is about 37278.1939476687. The cubic root of 1389663744 is about 1115.9290303143.

The spelling of 1389663744 in words is "one billion, three hundred eighty-nine million, six hundred sixty-three thousand, seven hundred forty-four".