78307306 has 16 divisors (see below), whose sum is σ = 146445120. Its totient is φ = 30509280.

The previous prime is 78307301. The next prime is 78307331. The reversal of 78307306 is 60370387.

It is a super-2 number, since 2×78307306² = 12264068345955272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78307301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254091 + ... + 254398.

It is an arithmetic number, because the mean of its divisors is an integer number (9152820).

Almost surely, 2^78307306 is an apocalyptic number.

78307306 is a deficient number, since it is larger than the sum of its proper divisors (68137814).

78307306 is a wasteful number, since it uses less digits than its factorization.

78307306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508509.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 78307306 is about 8849.1415402851. The cubic root of 78307306 is about 427.8262498224.

The spelling of 78307306 in words is "seventy-eight million, three hundred seven thousand, three hundred six".