1389598145 has 16 divisors (see below), whose sum is σ = 1798750800. Its totient is φ = 1024472064.

The previous prime is 1389598129. The next prime is 1389598181. The reversal of 1389598145 is 5418959831.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 642723904 + 746874241 = 25352^2 + 27329^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389598145 - 2⁴ = 1389598129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22781 + ... + 57429.

It is an arithmetic number, because the mean of its divisors is an integer number (112421925).

Almost surely, 2^1389598145 is an apocalyptic number.

It is an amenable number.

1389598145 is a deficient number, since it is larger than the sum of its proper divisors (409152655).

1389598145 is a wasteful number, since it uses less digits than its factorization.

1389598145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35284.

The product of its digits is 1555200, while the sum is 53.

The square root of 1389598145 is about 37277.3140797456. The cubic root of 1389598145 is about 1115.9114709154.

The spelling of 1389598145 in words is "one billion, three hundred eighty-nine million, five hundred ninety-eight thousand, one hundred forty-five".