80788978 has 8 divisors (see below), whose sum is σ = 121655772. Its totient is φ = 40237056.

The previous prime is 80788937. The next prime is 80788979. The reversal of 80788978 is 87988708.

It can be written as a sum of positive squares in 2 ways, for example, as 49238289 + 31550689 = 7017^2 + 5617^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (80788979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78075 + ... + 79102.

Almost surely, 2^80788978 is an apocalyptic number.

80788978 is a deficient number, since it is larger than the sum of its proper divisors (40866794).

80788978 is a wasteful number, since it uses less digits than its factorization.

80788978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157436.

The product of its (nonzero) digits is 1806336, while the sum is 55.

The square root of 80788978 is about 8988.2689100850. The cubic root of 80788978 is about 432.2988080460.

The spelling of 80788978 in words is "eighty million, seven hundred eighty-eight thousand, nine hundred seventy-eight".