1389046281 has 16 divisors (see below), whose sum is σ = 2228044800. Its totient is φ = 751964688.

The previous prime is 1389046277. The next prime is 1389046289. The reversal of 1389046281 is 1826409831.

It is not a de Polignac number, because 1389046281 - 2² = 1389046277 is a prime.

It is a super-2 number, since 2×1389046281² = 3858899141519861922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1389046289) 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 15 ways as a sum of consecutive naturals, for example, 1740261 + ... + 1741058.

It is an arithmetic number, because the mean of its divisors is an integer number (139252800).

Almost surely, 2^1389046281 is an apocalyptic number.

It is an amenable number.

1389046281 is a deficient number, since it is larger than the sum of its proper divisors (838998519).

1389046281 is a wasteful number, since it uses less digits than its factorization.

1389046281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481348.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1389046281 is about 37269.9112019334. The cubic root of 1389046281 is about 1115.7637272645.

The spelling of 1389046281 in words is "one billion, three hundred eighty-nine million, forty-six thousand, two hundred eighty-one".