78965478 has 12 divisors (see below), whose sum is σ = 171091908. Its totient is φ = 26321820.

The previous prime is 78965473. The next prime is 78965479. The reversal of 78965478 is 87456987.

78965478 is a `hidden beast` number, since 7 + 8 + 96 + 547 + 8 = 666.

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 (78965473) 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, 2193468 + ... + 2193503.

It is an arithmetic number, because the mean of its divisors is an integer number (14257659).

Almost surely, 2^78965478 is an apocalyptic number.

78965478 is an abundant number, since it is smaller than the sum of its proper divisors (92126430).

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

78965478 is a wasteful number, since it uses less digits than its factorization.

78965478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386979 (or 4386976 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 78965478 is about 8886.2521908845. The cubic root of 78965478 is about 429.0215321646.

The spelling of 78965478 in words is "seventy-eight million, nine hundred sixty-five thousand, four hundred seventy-eight".