68312278 has 8 divisors (see below), whose sum is σ = 103463568. Its totient is φ = 33824424.

The previous prime is 68312269. The next prime is 68312287. The reversal of 68312278 is 87221386.

It is an interprime number because it is at equal distance from previous prime (68312269) and next prime (68312287).

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

It is a super-3 number, since 3×68312278³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165601 + ... + 166012.

It is an arithmetic number, because the mean of its divisors is an integer number (12932946).

Almost surely, 2^68312278 is an apocalyptic number.

68312278 is a deficient number, since it is larger than the sum of its proper divisors (35151290).

68312278 is a wasteful number, since it uses less digits than its factorization.

68312278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331718.

The product of its digits is 32256, while the sum is 37.

The square root of 68312278 is about 8265.1241974939. The cubic root of 68312278 is about 408.7893655410.

The spelling of 68312278 in words is "sixty-eight million, three hundred twelve thousand, two hundred seventy-eight".