1389055557 has 16 divisors (see below), whose sum is σ = 1862688960. Its totient is φ = 920744832.

The previous prime is 1389055529. The next prime is 1389055571. The reversal of 1389055557 is 7555509831.

It is not a de Polignac number, because 1389055557 - 2⁸ = 1389055301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389055957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466369 + ... + 469337.

It is an arithmetic number, because the mean of its divisors is an integer number (116418060).

Almost surely, 2^1389055557 is an apocalyptic number.

It is an amenable number.

1389055557 is a deficient number, since it is larger than the sum of its proper divisors (473633403).

1389055557 is a wasteful number, since it uses less digits than its factorization.

1389055557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812.

The product of its (nonzero) digits is 945000, while the sum is 48.

The square root of 1389055557 is about 37270.0356452741. The cubic root of 1389055557 is about 1115.7662109353.

The spelling of 1389055557 in words is "one billion, three hundred eighty-nine million, fifty-five thousand, five hundred fifty-seven".