78633985 has 8 divisors (see below), whose sum is σ = 94536576. Its totient is φ = 62790000.

The previous prime is 78633983. The next prime is 78634007. The reversal of 78633985 is 58933687.

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

It is not a de Polignac number, because 78633985 - 2¹ = 78633983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78633983) by changing a digit.

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, 11641 + ... + 17110.

It is an arithmetic number, because the mean of its divisors is an integer number (11817072).

Almost surely, 2^78633985 is an apocalyptic number.

It is an amenable number.

78633985 is a deficient number, since it is larger than the sum of its proper divisors (15902591).

78633985 is a wasteful number, since it uses less digits than its factorization.

78633985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29303.

The product of its digits is 1088640, while the sum is 49.

The square root of 78633985 is about 8867.5805606716. The cubic root of 78633985 is about 428.4203533911.

The spelling of 78633985 in words is "seventy-eight million, six hundred thirty-three thousand, nine hundred eighty-five".