78861242 has 8 divisors (see below), whose sum is σ = 118389600. Its totient is φ = 39398044.

The previous prime is 78861217. The next prime is 78861281. The reversal of 78861242 is 24216887.

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

It is a junction number, because it is equal to n+sod(n) for n = 78861196 and 78861205.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13142 + ... + 18177.

It is an arithmetic number, because the mean of its divisors is an integer number (14798700).

Almost surely, 2^78861242 is an apocalyptic number.

78861242 is a deficient number, since it is larger than the sum of its proper divisors (39528358).

78861242 is a wasteful number, since it uses less digits than its factorization.

78861242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32580.

The product of its digits is 43008, while the sum is 38.

The square root of 78861242 is about 8880.3852393914. The cubic root of 78861242 is about 428.8326767268.

The spelling of 78861242 in words is "seventy-eight million, eight hundred sixty-one thousand, two hundred forty-two".