78076378 has 4 divisors (see below), whose sum is σ = 117114570. Its totient is φ = 39038188.

The previous prime is 78076363. The next prime is 78076387. The reversal of 78076378 is 87367087.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87367087 = 23 ⋅3798569.

It can be written as a sum of positive squares in only one way, i.e., 42471289 + 35605089 = 6517^2 + 5967^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19519093 + ... + 19519096.

Almost surely, 2^78076378 is an apocalyptic number.

78076378 is a deficient number, since it is larger than the sum of its proper divisors (39038192).

78076378 is a wasteful number, since it uses less digits than its factorization.

78076378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39038191.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 78076378 is about 8836.0838610778. The cubic root of 78076378 is about 427.4052829842.

The spelling of 78076378 in words is "seventy-eight million, seventy-six thousand, three hundred seventy-eight".