1389791480 has 384 divisors, whose sum is σ = 4412620800. Its totient is φ = 383201280.

The previous prime is 1389791479. The next prime is 1389791483. The reversal of 1389791480 is 841979831.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389791483) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10943177 + ... + 10943303.

It is an arithmetic number, because the mean of its divisors is an integer number (11491200).

Almost surely, 2^1389791480 is an apocalyptic number.

1389791480 is a gapful number since it is divisible by the number (10) 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 1389791480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2206310400).

1389791480 is an abundant number, since it is smaller than the sum of its proper divisors (3022829320).

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

1389791480 is a wasteful number, since it uses less digits than its factorization.

1389791480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 1389791480 is about 37279.9071887257. The cubic root of 1389791480 is about 1115.9632208260.

The spelling of 1389791480 in words is "one billion, three hundred eighty-nine million, seven hundred ninety-one thousand, four hundred eighty".