1389395755 has 8 divisors (see below), whose sum is σ = 1818845424. Its totient is φ = 1010469600.

The previous prime is 1389395743. The next prime is 1389395759. The reversal of 1389395755 is 5575939831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1389395755 - 2⁵ = 1389395723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 25261741 = 1389395755 / (1 + 3 + 8 + 9 + 3 + 9 + 5 + 7 + 5 + 5).

It is a junction number, because it is equal to n+sod(n) for n = 1389395696 and 1389395705.

It is not an unprimeable number, because it can be changed into a prime (1389395759) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12630816 + ... + 12630925.

It is an arithmetic number, because the mean of its divisors is an integer number (227355678).

Almost surely, 2^1389395755 is an apocalyptic number.

1389395755 is a deficient number, since it is larger than the sum of its proper divisors (429449669).

1389395755 is a wasteful number, since it uses less digits than its factorization.

1389395755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25261757.

The product of its digits is 5103000, while the sum is 55.

The square root of 1389395755 is about 37274.5993271558. The cubic root of 1389395755 is about 1115.8572921134.

The spelling of 1389395755 in words is "one billion, three hundred eighty-nine million, three hundred ninety-five thousand, seven hundred fifty-five".