78081078 has 8 divisors (see below), whose sum is σ = 156162168. Its totient is φ = 26027024.

The previous prime is 78081071. The next prime is 78081083. The reversal of 78081078 is 87018087.

It is a happy number.

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

78081078 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78081071) 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, 6506751 + ... + 6506762.

It is an arithmetic number, because the mean of its divisors is an integer number (19520271).

Almost surely, 2^78081078 is an apocalyptic number.

78081078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78081078 is a wasteful number, since it uses less digits than its factorization.

78081078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13013518.

The product of its (nonzero) digits is 25088, while the sum is 39.

The square root of 78081078 is about 8836.3498119982. The cubic root of 78081078 is about 427.4138590502.

The spelling of 78081078 in words is "seventy-eight million, eighty-one thousand, seventy-eight".