78057843 has 8 divisors (see below), whose sum is σ = 105032400. Its totient is φ = 51560928.

The previous prime is 78057841. The next prime is 78057851. The reversal of 78057843 is 34875087.

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

It is not a de Polignac number, because 78057843 - 2¹ = 78057841 is a prime.

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 junction number, because it is equal to n+sod(n) for n = 78057795 and 78057804.

It is not an unprimeable number, because it can be changed into a prime (78057841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119028 + ... + 119681.

It is an arithmetic number, because the mean of its divisors is an integer number (13129050).

Almost surely, 2^78057843 is an apocalyptic number.

78057843 is a deficient number, since it is larger than the sum of its proper divisors (26974557).

78057843 is a wasteful number, since it uses less digits than its factorization.

78057843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238821.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 78057843 is about 8835.0349744639. The cubic root of 78057843 is about 427.3714589088.

The spelling of 78057843 in words is "seventy-eight million, fifty-seven thousand, eight hundred forty-three".