78985605 has 8 divisors (see below), whose sum is σ = 126376992. Its totient is φ = 42125648.

The previous prime is 78985591. The next prime is 78985619. The reversal of 78985605 is 50658987.

It is an interprime number because it is at equal distance from previous prime (78985591) and next prime (78985619).

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

It is a cyclic number.

It is not a de Polignac number, because 78985605 - 2⁵ = 78985573 is a prime.

It is a Curzon number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 2632839 + ... + 2632868.

It is an arithmetic number, because the mean of its divisors is an integer number (15797124).

Almost surely, 2^78985605 is an apocalyptic number.

It is an amenable number.

78985605 is a deficient number, since it is larger than the sum of its proper divisors (47391387).

78985605 is a wasteful number, since it uses less digits than its factorization.

78985605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5265715.

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 78985605 is about 8887.3845984069. The cubic root of 78985605 is about 429.0579792427.

The spelling of 78985605 in words is "seventy-eight million, nine hundred eighty-five thousand, six hundred five".