389038985 has 8 divisors (see below), whose sum is σ = 471130440. Its totient is φ = 308375424.

The previous prime is 389038913. The next prime is 389038987. The reversal of 389038985 is 589830983.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 139051264 + 249987721 = 11792^2 + 15811^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389038985 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (389038987) 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, 356372 + ... + 357461.

It is an arithmetic number, because the mean of its divisors is an integer number (58891305).

Almost surely, 2^389038985 is an apocalyptic number.

It is an amenable number.

389038985 is a deficient number, since it is larger than the sum of its proper divisors (82091455).

389038985 is a wasteful number, since it uses less digits than its factorization.

389038985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713947.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The square root of 389038985 is about 19724.0712075373. The cubic root of 389038985 is about 730.0137515393.

It can be divided in two parts, 3890 and 38985, that added together give a cube (42875 = 35³).

The spelling of 389038985 in words is "three hundred eighty-nine million, thirty-eight thousand, nine hundred eighty-five".