78315942 has 8 divisors (see below), whose sum is σ = 156631896. Its totient is φ = 26105312.

The previous prime is 78315917. The next prime is 78315977. The reversal of 78315942 is 24951387.

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

78315942 is an admirable number.

It is a super-2 number, since 2×78315942² = 12266773542694728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78315942.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6526323 + ... + 6526334.

It is an arithmetic number, because the mean of its divisors is an integer number (19578987).

Almost surely, 2^78315942 is an apocalyptic number.

78315942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78315942 is a wasteful number, since it uses less digits than its factorization.

78315942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13052662.

The product of its digits is 60480, while the sum is 39.

The square root of 78315942 is about 8849.6294837694. The cubic root of 78315942 is about 427.8419766295.

The spelling of 78315942 in words is "seventy-eight million, three hundred fifteen thousand, nine hundred forty-two".