78382438 has 16 divisors (see below), whose sum is σ = 121197600. Its totient is φ = 38001600.

The previous prime is 78382433. The next prime is 78382453. The reversal of 78382438 is 83428387.

It is a super-2 number, since 2×78382438² = 12287613173647688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78382394 and 78382403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78382433) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4138 + ... + 13186.

It is an arithmetic number, because the mean of its divisors is an integer number (7574850).

Almost surely, 2^78382438 is an apocalyptic number.

78382438 is a deficient number, since it is larger than the sum of its proper divisors (42815162).

78382438 is a wasteful number, since it uses less digits than its factorization.

78382438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9183.

The product of its digits is 258048, while the sum is 43.

The square root of 78382438 is about 8853.3856800661. The cubic root of 78382438 is about 427.9630321522.

The spelling of 78382438 in words is "seventy-eight million, three hundred eighty-two thousand, four hundred thirty-eight".