78634145 has 8 divisors (see below), whose sum is σ = 94466304. Its totient is φ = 62837104.

The previous prime is 78634111. The next prime is 78634169. The reversal of 78634145 is 54143687.

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 78634145 - 2²⁶ = 11525281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78634099 and 78634108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3569 + ... + 13038.

It is an arithmetic number, because the mean of its divisors is an integer number (11808288).

Almost surely, 2^78634145 is an apocalyptic number.

It is an amenable number.

78634145 is a deficient number, since it is larger than the sum of its proper divisors (15832159).

78634145 is a wasteful number, since it uses less digits than its factorization.

78634145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17559.

The product of its digits is 80640, while the sum is 38.

The square root of 78634145 is about 8867.5895822935. The cubic root of 78634145 is about 428.4206439661.

The spelling of 78634145 in words is "seventy-eight million, six hundred thirty-four thousand, one hundred forty-five".