78005756 has 12 divisors (see below), whose sum is σ = 138380592. Its totient is φ = 38468448.

The previous prime is 78005723. The next prime is 78005779. The reversal of 78005756 is 65750087.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133280 + ... + 133863.

It is an arithmetic number, because the mean of its divisors is an integer number (11531716).

Almost surely, 2^78005756 is an apocalyptic number.

It is an amenable number.

78005756 is a deficient number, since it is larger than the sum of its proper divisors (60374836).

78005756 is a wasteful number, since it uses less digits than its factorization.

78005756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267220 (or 267218 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 78005756 is about 8832.0867296466. The cubic root of 78005756 is about 427.2763779213.

The spelling of 78005756 in words is "seventy-eight million, five thousand, seven hundred fifty-six".