78478401 has 8 divisors (see below), whose sum is σ = 105616224. Its totient is φ = 51829760.

The previous prime is 78478381. The next prime is 78478403. The reversal of 78478401 is 10487487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78478401 - 2¹⁴ = 78462017 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78478401.

It is not an unprimeable number, because it can be changed into a prime (78478403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121920 + ... + 122561.

It is an arithmetic number, because the mean of its divisors is an integer number (13202028).

Almost surely, 2^78478401 is an apocalyptic number.

It is an amenable number.

78478401 is a deficient number, since it is larger than the sum of its proper divisors (27137823).

78478401 is a wasteful number, since it uses less digits than its factorization.

78478401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244591.

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 78478401 is about 8858.8035873926. The cubic root of 78478401 is about 428.1376115133.

The spelling of 78478401 in words is "seventy-eight million, four hundred seventy-eight thousand, four hundred one".