78085730 has 32 divisors (see below), whose sum is σ = 144789120. Its totient is φ = 30302080.

The previous prime is 78085727. The next prime is 78085739. The reversal of 78085730 is 3758087.

It is not an unprimeable number, because it can be changed into a prime (78085739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92651 + ... + 93489.

It is an arithmetic number, because the mean of its divisors is an integer number (4524660).

Almost surely, 2^78085730 is an apocalyptic number.

78085730 is a deficient number, since it is larger than the sum of its proper divisors (66703390).

78085730 is a wasteful number, since it uses less digits than its factorization.

78085730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 78085730 is about 8836.6130389420. The cubic root of 78085730 is about 427.4223471920.

The spelling of 78085730 in words is "seventy-eight million, eighty-five thousand, seven hundred thirty".