1238268985 has 8 divisors (see below), whose sum is σ = 1497266496. Its totient is φ = 983052720.

The previous prime is 1238268953. The next prime is 1238269061. The reversal of 1238268985 is 5898628321.

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

It is not a de Polignac number, because 1238268985 - 2⁵ = 1238268953 is a prime.

It is a Duffinian number.

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, 944589 + ... + 945898.

It is an arithmetic number, because the mean of its divisors is an integer number (187158312).

Almost surely, 2^1238268985 is an apocalyptic number.

It is an amenable number.

1238268985 is a deficient number, since it is larger than the sum of its proper divisors (258997511).

1238268985 is a wasteful number, since it uses less digits than its factorization.

1238268985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890623.

The product of its digits is 1658880, while the sum is 52.

The square root of 1238268985 is about 35189.0463780990. The cubic root of 1238268985 is about 1073.8369205531.

The spelling of 1238268985 in words is "one billion, two hundred thirty-eight million, two hundred sixty-eight thousand, nine hundred eighty-five".