268409985 has 16 divisors (see below), whose sum is σ = 439931520. Its totient is φ = 139660160.

The previous prime is 268409983. The next prime is 268410001. The reversal of 268409985 is 589904862.

It is not a de Polignac number, because 268409985 - 2¹ = 268409983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (268409983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217605 + ... + 218834.

It is an arithmetic number, because the mean of its divisors is an integer number (27495720).

Almost surely, 2^268409985 is an apocalyptic number.

It is an amenable number.

268409985 is a deficient number, since it is larger than the sum of its proper divisors (171521535).

268409985 is a wasteful number, since it uses less digits than its factorization.

268409985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436488.

The product of its (nonzero) digits is 1244160, while the sum is 51.

The square root of 268409985 is about 16383.2226683275. Note that the first 3 decimals coincide. The cubic root of 268409985 is about 645.0591737070.

The spelling of 268409985 in words is "two hundred sixty-eight million, four hundred nine thousand, nine hundred eighty-five".