78330905 has 8 divisors (see below), whose sum is σ = 95997312. Its totient is φ = 61331248.

The previous prime is 78330899. The next prime is 78330919. The reversal of 78330905 is 50903387.

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 78330905 - 2¹⁸ = 78068761 is a prime.

It is a super-2 number, since 2×78330905² = 12271461356238050, which contains 22 as substring.

It is an unprimeable number.

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, 166427 + ... + 166896.

It is an arithmetic number, because the mean of its divisors is an integer number (11999664).

Almost surely, 2^78330905 is an apocalyptic number.

It is an amenable number.

78330905 is a deficient number, since it is larger than the sum of its proper divisors (17666407).

78330905 is a wasteful number, since it uses less digits than its factorization.

78330905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333375.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 78330905 is about 8850.4748460182. The cubic root of 78330905 is about 427.8692226438.

The spelling of 78330905 in words is "seventy-eight million, three hundred thirty thousand, nine hundred five".