389690649 has 8 divisors (see below), whose sum is σ = 577319520. Its totient is φ = 259793748.

The previous prime is 389690641. The next prime is 389690669. The reversal of 389690649 is 946096983.

It is a happy number.

It is not a de Polignac number, because 389690649 - 2³ = 389690641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 389690595 and 389690604.

It is not an unprimeable number, because it can be changed into a prime (389690641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7216467 + ... + 7216520.

It is an arithmetic number, because the mean of its divisors is an integer number (72164940).

Almost surely, 2^389690649 is an apocalyptic number.

It is an amenable number.

389690649 is a deficient number, since it is larger than the sum of its proper divisors (187628871).

389690649 is a wasteful number, since it uses less digits than its factorization.

389690649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14432996 (or 14432990 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The square root of 389690649 is about 19740.5838059567. The cubic root of 389690649 is about 730.4211299980.

The spelling of 389690649 in words is "three hundred eighty-nine million, six hundred ninety thousand, six hundred forty-nine".