78672865 has 8 divisors (see below), whose sum is σ = 94973760. Its totient is φ = 62560752.

The previous prime is 78672851. The next prime is 78672871. The reversal of 78672865 is 56827687.

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 78672865 - 2⁹ = 78672353 is a prime.

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, 46275 + ... + 47944.

It is an arithmetic number, because the mean of its divisors is an integer number (11871720).

Almost surely, 2^78672865 is an apocalyptic number.

It is an amenable number.

78672865 is a deficient number, since it is larger than the sum of its proper divisors (16300895).

78672865 is a wasteful number, since it uses less digits than its factorization.

78672865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94391.

The product of its digits is 1128960, while the sum is 49.

The square root of 78672865 is about 8869.7725449980. The cubic root of 78672865 is about 428.4909515292.

The spelling of 78672865 in words is "seventy-eight million, six hundred seventy-two thousand, eight hundred sixty-five".