1389056508 has 54 divisors (see below), whose sum is σ = 4084492776. Its totient is φ = 396872784.

The previous prime is 1389056453. The next prime is 1389056509. The reversal of 1389056508 is 8056509831.

1389056508 is a `hidden beast` number, since 1 + 3 + 8 + 90 + 56 + 508 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389056509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 391960 + ... + 395487.

Almost surely, 2^1389056508 is an apocalyptic number.

1389056508 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1389056508 is an abundant number, since it is smaller than the sum of its proper divisors (2695436268).

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

1389056508 is a wasteful number, since it uses less digits than its factorization.

1389056508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787471 (or 787459 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 1389056508 is about 37270.0484035103. The cubic root of 1389056508 is about 1115.7664655672.

The spelling of 1389056508 in words is "one billion, three hundred eighty-nine million, fifty-six thousand, five hundred eight".