1389125530 has 32 divisors (see below), whose sum is σ = 2834496000. Its totient is φ = 485911872.

The previous prime is 1389125527. The next prime is 1389125537. The reversal of 1389125530 is 355219831.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1389125530.

It is not an unprimeable number, because it can be changed into a prime (1389125537) 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 15 ways as a sum of consecutive naturals, for example, 278730 + ... + 283669.

It is an arithmetic number, because the mean of its divisors is an integer number (88578000).

Almost surely, 2^1389125530 is an apocalyptic number.

1389125530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389125530 is an abundant number, since it is smaller than the sum of its proper divisors (1445370470).

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

1389125530 is a wasteful number, since it uses less digits than its factorization.

1389125530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562438.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1389125530 is about 37270.9743634373. The cubic root of 1389125530 is about 1115.7849460147.

The spelling of 1389125530 in words is "one billion, three hundred eighty-nine million, one hundred twenty-five thousand, five hundred thirty".