1389335888 has 10 divisors (see below), whose sum is σ = 2691838314. Its totient is φ = 694667936.

The previous prime is 1389335873. The next prime is 1389335951. The reversal of 1389335888 is 8885339831.

It can be written as a sum of positive squares in only one way, i.e., 1383244864 + 6091024 = 37192^2 + 2468^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43416731 + ... + 43416762.

Almost surely, 2^1389335888 is an apocalyptic number.

It is an amenable number.

1389335888 is a deficient number, since it is larger than the sum of its proper divisors (1302502426).

1389335888 is an equidigital number, since it uses as much as digits as its factorization.

1389335888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86833501 (or 86833495 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 56.

The square root of 1389335888 is about 37273.7962649366. The cubic root of 1389335888 is about 1115.8412650052.

The spelling of 1389335888 in words is "one billion, three hundred eighty-nine million, three hundred thirty-five thousand, eight hundred eighty-eight".