78065378 has 16 divisors (see below), whose sum is σ = 122929920. Its totient is φ = 37131600.

The previous prime is 78065369. The next prime is 78065399. The reversal of 78065378 is 87356087.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7013 + ... + 14328.

It is an arithmetic number, because the mean of its divisors is an integer number (7683120).

Almost surely, 2^78065378 is an apocalyptic number.

78065378 is a deficient number, since it is larger than the sum of its proper divisors (44864542).

78065378 is a wasteful number, since it uses less digits than its factorization.

78065378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21433.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 78065378 is about 8835.4613914611. The cubic root of 78065378 is about 427.3852099948.

The spelling of 78065378 in words is "seventy-eight million, sixty-five thousand, three hundred seventy-eight".