1389761530 has 8 divisors (see below), whose sum is σ = 2501570772. Its totient is φ = 555904608.

The previous prime is 1389761501. The next prime is 1389761533. The reversal of 1389761530 is 351679831.

It can be written as a sum of positive squares in 2 ways, for example, as 1364046489 + 25715041 = 36933^2 + 5071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1389761530² = 3862874220535881800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1389761533) 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 3 ways as a sum of consecutive naturals, for example, 69488067 + ... + 69488086.

Almost surely, 2^1389761530 is an apocalyptic number.

1389761530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389761530 is a deficient number, since it is larger than the sum of its proper divisors (1111809242).

1389761530 is a wasteful number, since it uses less digits than its factorization.

1389761530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138976160.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1389761530 is about 37279.5054956473. The cubic root of 1389761530 is about 1115.9552044343.

The spelling of 1389761530 in words is "one billion, three hundred eighty-nine million, seven hundred sixty-one thousand, five hundred thirty".