1389630500 has 24 divisors (see below), whose sum is σ = 3034954104. Its totient is φ = 555852000.

The previous prime is 1389630467. The next prime is 1389630511. The reversal of 1389630500 is 50369831.

It can be written as a sum of positive squares in 4 ways, for example, as 94206436 + 1295424064 = 9706^2 + 35992^2 .

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 7 ways as a sum of consecutive naturals, for example, 1389131 + ... + 1390130.

It is an arithmetic number, because the mean of its divisors is an integer number (126456421).

Almost surely, 2^1389630500 is an apocalyptic number.

1389630500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389630500 is an abundant number, since it is smaller than the sum of its proper divisors (1645323604).

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

1389630500 is a wasteful number, since it uses less digits than its factorization.

1389630500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779280 (or 2779268 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 1389630500 is about 37277.7480543018. The cubic root of 1389630500 is about 1115.9201317011.

The spelling of 1389630500 in words is "one billion, three hundred eighty-nine million, six hundred thirty thousand, five hundred".