78617042 has 8 divisors (see below), whose sum is σ = 134772096. Its totient is φ = 33693012.

The previous prime is 78617017. The next prime is 78617069. The reversal of 78617042 is 24071687.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 78616993 and 78617011.

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, 2807738 + ... + 2807765.

It is an arithmetic number, because the mean of its divisors is an integer number (16846512).

Almost surely, 2^78617042 is an apocalyptic number.

78617042 is a deficient number, since it is larger than the sum of its proper divisors (56155054).

78617042 is a wasteful number, since it uses less digits than its factorization.

78617042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5615512.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 78617042 is about 8866.6251753415. The cubic root of 78617042 is about 428.3895810839.

The spelling of 78617042 in words is "seventy-eight million, six hundred seventeen thousand, forty-two".