1389662080 has 32 divisors (see below), whose sum is σ = 3322162440. Its totient is φ = 555864576.

The previous prime is 1389662069. The next prime is 1389662081. The reversal of 1389662080 is 802669831.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389662081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1085034 + ... + 1086313.

Almost surely, 2^1389662080 is an apocalyptic number.

1389662080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389662080 is an abundant number, since it is smaller than the sum of its proper divisors (1932500360).

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

1389662080 is an equidigital number, since it uses as much as digits as its factorization.

1389662080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171366 (or 2171354 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1389662080 is about 37278.1716289842. The cubic root of 1389662080 is about 1115.9285849052.

The spelling of 1389662080 in words is "one billion, three hundred eighty-nine million, six hundred sixty-two thousand, eighty".