78002705 has 16 divisors (see below), whose sum is σ = 104606208. Its totient is φ = 55344000.

The previous prime is 78002699. The next prime is 78002707. The reversal of 78002705 is 50720087.

It is not a de Polignac number, because 78002705 - 2⁶ = 78002641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78002707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15041 + ... + 19550.

It is an arithmetic number, because the mean of its divisors is an integer number (6537888).

Almost surely, 2^78002705 is an apocalyptic number.

It is an amenable number.

78002705 is a deficient number, since it is larger than the sum of its proper divisors (26603503).

78002705 is a wasteful number, since it uses less digits than its factorization.

78002705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34648.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 78002705 is about 8831.9140054690. The cubic root of 78002705 is about 427.2708072331.

The spelling of 78002705 in words is "seventy-eight million, two thousand, seven hundred five".