80868978 has 48 divisors (see below), whose sum is σ = 185608800. Its totient is φ = 25375680.

The previous prime is 80868971. The next prime is 80868979. The reversal of 80868978 is 87986808.

It is not an unprimeable number, because it can be changed into a prime (80868971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60558 + ... + 61878.

It is an arithmetic number, because the mean of its divisors is an integer number (3866850).

Almost surely, 2^80868978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80868978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92804400).

80868978 is an abundant number, since it is smaller than the sum of its proper divisors (104739822).

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

80868978 is a wasteful number, since it uses less digits than its factorization.

80868978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527 (or 1524 counting only the distinct ones).

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

The square root of 80868978 is about 8992.7180540702. The cubic root of 80868978 is about 432.4414533110.

The spelling of 80868978 in words is "eighty million, eight hundred sixty-eight thousand, nine hundred seventy-eight".