78040047 has 8 divisors (see below), whose sum is σ = 110174256. Its totient is φ = 48966272.

The previous prime is 78040037. The next prime is 78040111. The reversal of 78040047 is 74004087.

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

It is a cyclic number.

It is not a de Polignac number, because 78040047 - 2¹⁹ = 77515759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78039996 and 78040023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78040037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765048 + ... + 765149.

It is an arithmetic number, because the mean of its divisors is an integer number (13771782).

Almost surely, 2^78040047 is an apocalyptic number.

78040047 is a deficient number, since it is larger than the sum of its proper divisors (32134209).

78040047 is a wasteful number, since it uses less digits than its factorization.

78040047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530217.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 78040047 is about 8834.0277903117. The cubic root of 78040047 is about 427.3389783780.

The spelling of 78040047 in words is "seventy-eight million, forty thousand, forty-seven".