78330505 has 8 divisors (see below), whose sum is σ = 102541824. Its totient is φ = 56967600.

The previous prime is 78330481. The next prime is 78330523. The reversal of 78330505 is 50503387.

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

It is not a de Polignac number, because 78330505 - 2²³ = 69941897 is a prime.

It is a super-2 number, since 2×78330505² = 12271336027110050, 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, 712041 + ... + 712150.

It is an arithmetic number, because the mean of its divisors is an integer number (12817728).

Almost surely, 2^78330505 is an apocalyptic number.

It is an amenable number.

78330505 is a deficient number, since it is larger than the sum of its proper divisors (24211319).

78330505 is a wasteful number, since it uses less digits than its factorization.

78330505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424207.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 78330505 is about 8850.4522483317. The cubic root of 78330505 is about 427.8684943319.

The spelling of 78330505 in words is "seventy-eight million, three hundred thirty thousand, five hundred five".