78000080 has 80 divisors (see below), whose sum is σ = 194612544. Its totient is φ = 28968960.

The previous prime is 78000071. The next prime is 78000089. The reversal of 78000080 is 8000087.

It is an interprime number because it is at equal distance from previous prime (78000071) and next prime (78000089).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78000089) 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 15 ways as a sum of consecutive naturals, for example, 112535 + ... + 113225.

Almost surely, 2^78000080 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78000080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97306272).

78000080 is an abundant number, since it is smaller than the sum of its proper divisors (116612464).

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

78000080 is a wasteful number, since it uses less digits than its factorization.

78000080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 78000080 is about 8831.7653954348. The cubic root of 78000080 is about 427.2660142435.

The spelling of 78000080 in words is "seventy-eight million, eighty", and thus it is an aban number and an uban number.