78047394 has 8 divisors (see below), whose sum is σ = 156094800. Its totient is φ = 26015796.

The previous prime is 78047353. The next prime is 78047407. The reversal of 78047394 is 49374087.

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

78047394 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon 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, 6503944 + ... + 6503955.

It is an arithmetic number, because the mean of its divisors is an integer number (19511850).

Almost surely, 2^78047394 is an apocalyptic number.

78047394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78047394 is a wasteful number, since it uses less digits than its factorization.

78047394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13007904.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 78047394 is about 8834.4436157576. The cubic root of 78047394 is about 427.3523884201.

The spelling of 78047394 in words is "seventy-eight million, forty-seven thousand, three hundred ninety-four".