78327678 has 32 divisors (see below), whose sum is σ = 184044672. Its totient is φ = 21909600.

The previous prime is 78327677. The next prime is 78327701. The reversal of 78327678 is 87672387.

It is a super-2 number, since 2×78327678² = 12270450281743368, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78327677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44788 + ... + 46503.

It is an arithmetic number, because the mean of its divisors is an integer number (5751396).

Almost surely, 2^78327678 is an apocalyptic number.

78327678 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

78327678 is an abundant number, since it is smaller than the sum of its proper divisors (105716994).

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

78327678 is a wasteful number, since it uses less digits than its factorization.

78327678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91320.

The product of its digits is 790272, while the sum is 48.

The square root of 78327678 is about 8850.2925375380. The cubic root of 78327678 is about 427.8633469172.

The spelling of 78327678 in words is "seventy-eight million, three hundred twenty-seven thousand, six hundred seventy-eight".