1389209708 has 12 divisors (see below), whose sum is σ = 2438333352. Its totient is φ = 692543040.

The previous prime is 1389209699. The next prime is 1389209753. The reversal of 1389209708 is 8079029831.

It is a super-2 number, since 2×1389209708² = 3859807225602890528, which contains 22 as substring.

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, 513938 + ... + 516633.

It is an arithmetic number, because the mean of its divisors is an integer number (203194446).

Almost surely, 2^1389209708 is an apocalyptic number.

It is an amenable number.

1389209708 is a deficient number, since it is larger than the sum of its proper divisors (1049123644).

1389209708 is a wasteful number, since it uses less digits than its factorization.

1389209708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030912 (or 1030910 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 1389209708 is about 37272.1036165119. The cubic root of 1389209708 is about 1115.8074836102.

The spelling of 1389209708 in words is "one billion, three hundred eighty-nine million, two hundred nine thousand, seven hundred eight".