999968278 has 16 divisors (see below), whose sum is σ = 1537431840. Its totient is φ = 487604416.

The previous prime is 999968269. The next prime is 999968279. The reversal of 999968278 is 872869999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999968279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10543 + ... + 45946.

It is an arithmetic number, because the mean of its divisors is an integer number (96089490).

Almost surely, 2^999968278 is an apocalyptic number.

999968278 is a deficient number, since it is larger than the sum of its proper divisors (537463562).

999968278 is a wasteful number, since it uses less digits than its factorization.

999968278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56711.

The product of its digits is 35271936, while the sum is 67.

The square root of 999968278 is about 31622.2750288464. The cubic root of 999968278 is about 999.9894258882.

The spelling of 999968278 in words is "nine hundred ninety-nine million, nine hundred sixty-eight thousand, two hundred seventy-eight".