1389657120 has 48 divisors (see below), whose sum is σ = 4377421440. Its totient is φ = 370575104.

The previous prime is 1389657107. The next prime is 1389657121. The reversal of 1389657120 is 217569831.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1389657120² = 3862293822333388800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1389657121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1447080 + ... + 1448039.

It is an arithmetic number, because the mean of its divisors is an integer number (91196280).

Almost surely, 2^1389657120 is an apocalyptic number.

1389657120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389657120 is an abundant number, since it is smaller than the sum of its proper divisors (2987764320).

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

1389657120 is a wasteful number, since it uses less digits than its factorization.

1389657120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2895137 (or 2895129 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1389657120 is about 37278.1051020569. The cubic root of 1389657120 is about 1115.9272572414.

The spelling of 1389657120 in words is "one billion, three hundred eighty-nine million, six hundred fifty-seven thousand, one hundred twenty".