78446080 has 40 divisors (see below), whose sum is σ = 188092872. Its totient is φ = 31377408.

The previous prime is 78446059. The next prime is 78446083. The reversal of 78446080 is 8064487.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78446083) 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, 12762 + ... + 17881.

Almost surely, 2^78446080 is an apocalyptic number.

It is an amenable number.

78446080 is an abundant number, since it is smaller than the sum of its proper divisors (109646792).

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

78446080 is an equidigital number, since it uses as much as digits as its factorization.

78446080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30666 (or 30650 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 78446080 is about 8856.9791689944. The cubic root of 78446080 is about 428.0788278833.

It can be divided in two parts, 7844 and 6080, that added together give a square (13924 = 118²).

The spelling of 78446080 in words is "seventy-eight million, four hundred forty-six thousand, eighty".