68278940 has 24 divisors (see below), whose sum is σ = 146884752. Its totient is φ = 26645120.

The previous prime is 68278939. The next prime is 68278993. The reversal of 68278940 is 4987286.

It is a junction number, because it is equal to n+sod(n) for n = 68278891 and 68278900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40814 + ... + 42453.

It is an arithmetic number, because the mean of its divisors is an integer number (6120198).

Almost surely, 2^68278940 is an apocalyptic number.

It is an amenable number.

68278940 is an abundant number, since it is smaller than the sum of its proper divisors (78605812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68278940 is a wasteful number, since it uses less digits than its factorization.

68278940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83317 (or 83315 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 68278940 is about 8263.1071637732. The cubic root of 68278940 is about 408.7228551086.

The spelling of 68278940 in words is "sixty-eight million, two hundred seventy-eight thousand, nine hundred forty".