1389705960 has 64 divisors (see below), whose sum is σ = 4231368000. Its totient is φ = 365054976.

The previous prime is 1389705929. The next prime is 1389706007. The reversal of 1389705960 is 695079831.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78385 + ... + 94464.

It is an arithmetic number, because the mean of its divisors is an integer number (66115125).

Almost surely, 2^1389705960 is an apocalyptic number.

1389705960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389705960 is an abundant number, since it is smaller than the sum of its proper divisors (2841662040).

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

1389705960 is a wasteful number, since it uses less digits than its factorization.

1389705960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172930 (or 172926 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 1389705960 is about 37278.7601725165. The cubic root of 1389705960 is about 1115.9403303100.

The spelling of 1389705960 in words is "one billion, three hundred eighty-nine million, seven hundred five thousand, nine hundred sixty".