78695642 has 8 divisors (see below), whose sum is σ = 118226196. Its totient is φ = 39286912.

The previous prime is 78695641. The next prime is 78695651. The reversal of 78695642 is 24659687.

It can be written as a sum of positive squares in 2 ways, for example, as 78659161 + 36481 = 8869^2 + 191^2 .

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

It is not an unprimeable number, because it can be changed into a prime (78695641) 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 3 ways as a sum of consecutive naturals, for example, 28823 + ... + 31434.

Almost surely, 2^78695642 is an apocalyptic number.

78695642 is a deficient number, since it is larger than the sum of its proper divisors (39530554).

78695642 is a wasteful number, since it uses less digits than its factorization.

78695642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60912.

The product of its digits is 725760, while the sum is 47.

The square root of 78695642 is about 8871.0564196154. The cubic root of 78695642 is about 428.5322991048.

The spelling of 78695642 in words is "seventy-eight million, six hundred ninety-five thousand, six hundred forty-two".