68078940 has 24 divisors (see below), whose sum is σ = 190621200. Its totient is φ = 18154368.

The previous prime is 68078929. The next prime is 68078947. The reversal of 68078940 is 4987086.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 68078892 and 68078901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68078947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567265 + ... + 567384.

It is an arithmetic number, because the mean of its divisors is an integer number (7942550).

Almost surely, 2^68078940 is an apocalyptic number.

68078940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68078940 is an abundant number, since it is smaller than the sum of its proper divisors (122542260).

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

68078940 is a wasteful number, since it uses less digits than its factorization.

68078940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134661 (or 1134659 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 68078940 is about 8250.9963034775. The cubic root of 68078940 is about 408.3233931589.

The spelling of 68078940 in words is "sixty-eight million, seventy-eight thousand, nine hundred forty".