68456278 has 16 divisors (see below), whose sum is σ = 117915840. Its totient is φ = 29478600.

The previous prime is 68456243. The next prime is 68456279. The reversal of 68456278 is 87265486.

It is a super-2 number, since 2×68456278² = 9372523995226568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68456279) 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, 81468 + ... + 82303.

It is an arithmetic number, because the mean of its divisors is an integer number (7369740).

Almost surely, 2^68456278 is an apocalyptic number.

68456278 is a deficient number, since it is larger than the sum of its proper divisors (49459562).

68456278 is a wasteful number, since it uses less digits than its factorization.

68456278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163803.

The product of its digits is 645120, while the sum is 46.

The square root of 68456278 is about 8273.8309143951. The cubic root of 68456278 is about 409.0764020565.

The spelling of 68456278 in words is "sixty-eight million, four hundred fifty-six thousand, two hundred seventy-eight".