78688342 has 12 divisors (see below), whose sum is σ = 125384940. Its totient is φ = 37029536.

The previous prime is 78688333. The next prime is 78688361. The reversal of 78688342 is 24388687.

It is a junction number, because it is equal to n+sod(n) for n = 78688292 and 78688301.

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 5 ways as a sum of consecutive naturals, for example, 67492 + ... + 68647.

It is an arithmetic number, because the mean of its divisors is an integer number (10448745).

Almost surely, 2^78688342 is an apocalyptic number.

78688342 is a deficient number, since it is larger than the sum of its proper divisors (46696598).

78688342 is a wasteful number, since it uses less digits than its factorization.

78688342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136175 (or 136158 counting only the distinct ones).

The product of its digits is 516096, while the sum is 46.

The square root of 78688342 is about 8870.6449596408. The cubic root of 78688342 is about 428.5190481274.

The spelling of 78688342 in words is "seventy-eight million, six hundred eighty-eight thousand, three hundred forty-two".