1389147952 has 20 divisors (see below), whose sum is σ = 2728345960. Its totient is φ = 685058688.

The previous prime is 1389147923. The next prime is 1389147983. The reversal of 1389147952 is 2597419831.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1389147896 and 1389147905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593502 + ... + 595837.

It is an arithmetic number, because the mean of its divisors is an integer number (136417298).

Almost surely, 2^1389147952 is an apocalyptic number.

It is an amenable number.

1389147952 is a deficient number, since it is larger than the sum of its proper divisors (1339198008).

1389147952 is a wasteful number, since it uses less digits than its factorization.

1389147952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189420 (or 1189414 counting only the distinct ones).

The product of its digits is 544320, while the sum is 49.

The square root of 1389147952 is about 37271.2751592966. The cubic root of 1389147952 is about 1115.7909493107.

The spelling of 1389147952 in words is "one billion, three hundred eighty-nine million, one hundred forty-seven thousand, nine hundred fifty-two".