68878980 has 36 divisors (see below), whose sum is σ = 208933452. Its totient is φ = 18367680.

The previous prime is 68878967. The next prime is 68878981. The reversal of 68878980 is 8987886.

It can be written as a sum of positive squares in 2 ways, for example, as 19766916 + 49112064 = 4446^2 + 7008^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (68878981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191151 + ... + 191510.

It is an arithmetic number, because the mean of its divisors is an integer number (5803707).

Almost surely, 2^68878980 is an apocalyptic number.

68878980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68878980 is an abundant number, since it is smaller than the sum of its proper divisors (140054472).

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

68878980 is a wasteful number, since it uses less digits than its factorization.

68878980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382676 (or 382671 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The square root of 68878980 is about 8299.3361180278. The cubic root of 68878980 is about 409.9166596420.

The spelling of 68878980 in words is "sixty-eight million, eight hundred seventy-eight thousand, nine hundred eighty".