78847964 has 18 divisors (see below), whose sum is σ = 149415840. Its totient is φ = 36391056.

The previous prime is 78847963. The next prime is 78847981. The reversal of 78847964 is 46974887.

78847964 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

78847964 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78847963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57644 + ... + 58995.

It is an arithmetic number, because the mean of its divisors is an integer number (8300880).

Almost surely, 2^78847964 is an apocalyptic number.

It is an amenable number.

78847964 is a deficient number, since it is larger than the sum of its proper divisors (70567876).

78847964 is a wasteful number, since it uses less digits than its factorization.

78847964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116669 (or 116654 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 53.

The square root of 78847964 is about 8879.6376052179. The cubic root of 78847964 is about 428.8086076162.

The spelling of 78847964 in words is "seventy-eight million, eight hundred forty-seven thousand, nine hundred sixty-four".