1389280134 has 24 divisors (see below), whose sum is σ = 3054121560. Its totient is φ = 420993760.

The previous prime is 1389280049. The next prime is 1389280153. The reversal of 1389280134 is 4310829831.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1389280092 and 1389280101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 956079 + ... + 957530.

It is an arithmetic number, because the mean of its divisors is an integer number (127255065).

Almost surely, 2^1389280134 is an apocalyptic number.

1389280134 is an abundant number, since it is smaller than the sum of its proper divisors (1664841426).

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

1389280134 is a wasteful number, since it uses less digits than its factorization.

1389280134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913636 (or 1913625 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1389280134 is about 37273.0483593709. The cubic root of 1389280134 is about 1115.8263385821.

The spelling of 1389280134 in words is "one billion, three hundred eighty-nine million, two hundred eighty thousand, one hundred thirty-four".