310139985 has 16 divisors (see below), whose sum is σ = 503631936. Its totient is φ = 162938688.

The previous prime is 310139939. The next prime is 310140001. The reversal of 310139985 is 589931013.

It is not a de Polignac number, because 310139985 - 2¹⁶ = 310074449 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153294 + ... + 155303.

It is an arithmetic number, because the mean of its divisors is an integer number (31476996).

Almost surely, 2^310139985 is an apocalyptic number.

It is an amenable number.

310139985 is a deficient number, since it is larger than the sum of its proper divisors (193491951).

310139985 is a wasteful number, since it uses less digits than its factorization.

310139985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308672.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 310139985 is about 17610.7917198518. The cubic root of 310139985 is about 676.8918013221.

The spelling of 310139985 in words is "three hundred ten million, one hundred thirty-nine thousand, nine hundred eighty-five".