390008985 has 64 divisors (see below), whose sum is σ = 690094080. Its totient is φ = 187223040.

The previous prime is 390008981. The next prime is 390008987. The reversal of 390008985 is 589800093.

It is not a de Polignac number, because 390008985 - 2² = 390008981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (390008981) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 813976 + ... + 814454.

It is an arithmetic number, because the mean of its divisors is an integer number (10782720).

Almost surely, 2^390008985 is an apocalyptic number.

It is an amenable number.

390008985 is a deficient number, since it is larger than the sum of its proper divisors (300085095).

390008985 is a wasteful number, since it uses less digits than its factorization.

390008985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 390008985 is about 19748.6451434016. The cubic root of 390008985 is about 730.6199681068.

The spelling of 390008985 in words is "three hundred ninety million, eight thousand, nine hundred eighty-five".