1389132680 has 48 divisors (see below), whose sum is σ = 3384486180. Its totient is φ = 512908032.

The previous prime is 1389132677. The next prime is 1389132691. The reversal of 1389132680 is 862319831.

It can be written as a sum of positive squares in 6 ways, for example, as 64609444 + 1324523236 = 8038^2 + 36394^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95987 + ... + 109506.

Almost surely, 2^1389132680 is an apocalyptic number.

1389132680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389132680 is an abundant number, since it is smaller than the sum of its proper divisors (1995353500).

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

1389132680 is a wasteful number, since it uses less digits than its factorization.

1389132680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205530 (or 205513 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1389132680 is about 37271.0702824590. The cubic root of 1389132680 is about 1115.7868603722.

The spelling of 1389132680 in words is "one billion, three hundred eighty-nine million, one hundred thirty-two thousand, six hundred eighty".