78827384 has 8 divisors (see below), whose sum is σ = 147801360. Its totient is φ = 39413688.

The previous prime is 78827381. The next prime is 78827387. The reversal of 78827384 is 48372887.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78827381) and next prime (78827387).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78827381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4926704 + ... + 4926719.

It is an arithmetic number, because the mean of its divisors is an integer number (18475170).

Almost surely, 2^78827384 is an apocalyptic number.

It is an amenable number.

78827384 is a deficient number, since it is larger than the sum of its proper divisors (68973976).

78827384 is a wasteful number, since it uses less digits than its factorization.

78827384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9853429 (or 9853425 counting only the distinct ones).

The product of its digits is 602112, while the sum is 47.

The square root of 78827384 is about 8878.4786985159. The cubic root of 78827384 is about 428.7712967857.

The spelling of 78827384 in words is "seventy-eight million, eight hundred twenty-seven thousand, three hundred eighty-four".