78208705 has 8 divisors (see below), whose sum is σ = 95847552. Its totient is φ = 61235568.

The previous prime is 78208673. The next prime is 78208709. The reversal of 78208705 is 50780287.

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 78208705 - 2⁵ = 78208673 is a prime.

It is a super-2 number, since 2×78208705² = 12233203075554050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78208709) 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, 166167 + ... + 166636.

It is an arithmetic number, because the mean of its divisors is an integer number (11980944).

Almost surely, 2^78208705 is an apocalyptic number.

It is an amenable number.

78208705 is a deficient number, since it is larger than the sum of its proper divisors (17638847).

78208705 is a wasteful number, since it uses less digits than its factorization.

78208705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332855.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 78208705 is about 8843.5685670435. The cubic root of 78208705 is about 427.6466079472.

The spelling of 78208705 in words is "seventy-eight million, two hundred eight thousand, seven hundred five".