389946650 has 12 divisors (see below), whose sum is σ = 725300862. Its totient is φ = 155978640.

The previous prime is 389946643. The next prime is 389946659. The reversal of 389946650 is 56649983.

It can be written as a sum of positive squares in 3 ways, for example, as 341769169 + 48177481 = 18487^2 + 6941^2 .

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 7798933 = 389946650 / (3 + 8 + 9 + 9 + 4 + 6 + 6 + 5 + 0).

It is not an unprimeable number, because it can be changed into a prime (389946659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3899417 + ... + 3899516.

Almost surely, 2^389946650 is an apocalyptic number.

389946650 is a deficient number, since it is larger than the sum of its proper divisors (335354212).

389946650 is a wasteful number, since it uses less digits than its factorization.

389946650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7798945 (or 7798940 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 389946650 is about 19747.0668708039. The cubic root of 389946650 is about 730.5810411213.

The spelling of 389946650 in words is "three hundred eighty-nine million, nine hundred forty-six thousand, six hundred fifty".