1389172752 has 60 divisors (see below), whose sum is σ = 4241191344. Its totient is φ = 420960960.

The previous prime is 1389172747. The next prime is 1389172781. The reversal of 1389172752 is 2572719831.

It is a junction number, because it is equal to n+sod(n) for n = 1389172698 and 1389172707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 436918 + ... + 440085.

Almost surely, 2^1389172752 is an apocalyptic number.

1389172752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1389172752 is an abundant number, since it is smaller than the sum of its proper divisors (2852018592).

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

1389172752 is a wasteful number, since it uses less digits than its factorization.

1389172752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877028 (or 877019 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 1389172752 is about 37271.6078537001. The cubic root of 1389172752 is about 1115.7975892204.

The spelling of 1389172752 in words is "one billion, three hundred eighty-nine million, one hundred seventy-two thousand, seven hundred fifty-two".