389661770 has 8 divisors (see below), whose sum is σ = 701391204. Its totient is φ = 155864704.

The previous prime is 389661751. The next prime is 389661773. The reversal of 389661770 is 77166983.

It can be written as a sum of positive squares in 2 ways, for example, as 321879481 + 67782289 = 17941^2 + 8233^2 .

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

It is not an unprimeable number, because it can be changed into a prime (389661773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19483079 + ... + 19483098.

Almost surely, 2^389661770 is an apocalyptic number.

389661770 is a deficient number, since it is larger than the sum of its proper divisors (311729434).

389661770 is a wasteful number, since it uses less digits than its factorization.

389661770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38966184.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 389661770 is about 19739.8523297415. The cubic root of 389661770 is about 730.4030863241.

The spelling of 389661770 in words is "three hundred eighty-nine million, six hundred sixty-one thousand, seven hundred seventy".