1389112538 has 16 divisors (see below), whose sum is σ = 2290996224. Its totient is φ = 626441760.

The previous prime is 1389112523. The next prime is 1389112559. The reversal of 1389112538 is 8352119831.

It is a super-4 number, since 4×1389112538⁴ (a number of 38 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1389112495 and 1389112504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245795 + ... + 251382.

It is an arithmetic number, because the mean of its divisors is an integer number (143187264).

Almost surely, 2^1389112538 is an apocalyptic number.

1389112538 is a deficient number, since it is larger than the sum of its proper divisors (901883686).

1389112538 is a wasteful number, since it uses less digits than its factorization.

1389112538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497317.

The product of its digits is 51840, while the sum is 41.

The square root of 1389112538 is about 37270.8000719062. The cubic root of 1389112538 is about 1115.7814674898.

The spelling of 1389112538 in words is "one billion, three hundred eighty-nine million, one hundred twelve thousand, five hundred thirty-eight".