389418985 has 8 divisors (see below), whose sum is σ = 472933440. Its totient is φ = 307781424.

The previous prime is 389418973. The next prime is 389419027. The reversal of 389418985 is 589814983.

389418985 = T₁₆₁₁₁ + T₁₆₁₁₂ + T₁₆₁₁₃.

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

It is a cyclic number.

It is not a de Polignac number, because 389418985 - 2¹⁹ = 388894697 is a prime.

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

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 468765 + ... + 469594.

It is an arithmetic number, because the mean of its divisors is an integer number (59116680).

Almost surely, 2^389418985 is an apocalyptic number.

389418985 is the 16113-rd centered triangular number.

It is an amenable number.

389418985 is a deficient number, since it is larger than the sum of its proper divisors (83514455).

389418985 is an equidigital number, since it uses as much as digits as its factorization.

389418985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938447.

The product of its digits is 2488320, while the sum is 55.

The square root of 389418985 is about 19733.7017561328. The cubic root of 389418985 is about 730.2513583647.

The spelling of 389418985 in words is "three hundred eighty-nine million, four hundred eighteen thousand, nine hundred eighty-five".