78578546 has 8 divisors (see below), whose sum is σ = 118485504. Its totient is φ = 39083380.

The previous prime is 78578543. The next prime is 78578561. The reversal of 78578546 is 64587587.

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

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 78578494 and 78578503.

It is not an unprimeable number, because it can be changed into a prime (78578543) 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 3 ways as a sum of consecutive naturals, for example, 102470 + ... + 103233.

It is an arithmetic number, because the mean of its divisors is an integer number (14810688).

Almost surely, 2^78578546 is an apocalyptic number.

78578546 is a deficient number, since it is larger than the sum of its proper divisors (39906958).

78578546 is a wasteful number, since it uses less digits than its factorization.

78578546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205896.

The product of its digits is 1881600, while the sum is 50.

The square root of 78578546 is about 8864.4540723047. The cubic root of 78578546 is about 428.3196472317.

The spelling of 78578546 in words is "seventy-eight million, five hundred seventy-eight thousand, five hundred forty-six".