78376647 has 32 divisors (see below), whose sum is σ = 115473600. Its totient is φ = 47065088.

The previous prime is 78376637. The next prime is 78376673. The reversal of 78376647 is 74667387.

It is a cyclic number.

It is not a de Polignac number, because 78376647 - 2⁴ = 78376631 is a prime.

It is a super-2 number, since 2×78376647² = 12285797589925218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78376596 and 78376605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78376637) 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 31 ways as a sum of consecutive naturals, for example, 291229 + ... + 291497.

It is an arithmetic number, because the mean of its divisors is an integer number (3608550).

Almost surely, 2^78376647 is an apocalyptic number.

78376647 is a deficient number, since it is larger than the sum of its proper divisors (37096953).

78376647 is a wasteful number, since it uses less digits than its factorization.

78376647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its digits is 1185408, while the sum is 48.

The square root of 78376647 is about 8853.0586240011. The cubic root of 78376647 is about 427.9524923977.

The spelling of 78376647 in words is "seventy-eight million, three hundred seventy-six thousand, six hundred forty-seven".