78238682 has 4 divisors (see below), whose sum is σ = 117358026. Its totient is φ = 39119340.

The previous prime is 78238679. The next prime is 78238703. The reversal of 78238682 is 28683287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28683287 = 4909 ⋅5843.

It can be written as a sum of positive squares in only one way, i.e., 75707401 + 2531281 = 8701^2 + 1591^2 .

It is a super-2 number, since 2×78238682² = 12242582722194248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19559669 + ... + 19559672.

Almost surely, 2^78238682 is an apocalyptic number.

78238682 is a deficient number, since it is larger than the sum of its proper divisors (39119344).

78238682 is a wasteful number, since it uses less digits than its factorization.

78238682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39119343.

The product of its digits is 258048, while the sum is 44.

The square root of 78238682 is about 8845.2632521593. The cubic root of 78238682 is about 427.7012392265.

The spelling of 78238682 in words is "seventy-eight million, two hundred thirty-eight thousand, six hundred eighty-two".