78016730 has 32 divisors (see below), whose sum is σ = 153638208. Its totient is φ = 28288000.

The previous prime is 78016709. The next prime is 78016753. The reversal of 78016730 is 3761087.

It is a happy number.

It is a super-2 number, since 2×78016730² = 12173220319785800, which contains 22 as substring.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 47930 + ... + 49530.

It is an arithmetic number, because the mean of its divisors is an integer number (4801194).

Almost surely, 2^78016730 is an apocalyptic number.

78016730 is a deficient number, since it is larger than the sum of its proper divisors (75621478).

78016730 is a wasteful number, since it uses less digits than its factorization.

78016730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 78016730 is about 8832.7079652845. The cubic root of 78016730 is about 427.2964136697.

The spelling of 78016730 in words is "seventy-eight million, sixteen thousand, seven hundred thirty".