78484578 has 32 divisors (see below), whose sum is σ = 162328320. Its totient is φ = 25280640.

The previous prime is 78484577. The next prime is 78484633. The reversal of 78484578 is 87548487.

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 78484578.

It is not an unprimeable number, because it can be changed into a prime (78484577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25351 + ... + 28277.

It is an arithmetic number, because the mean of its divisors is an integer number (5072760).

Almost surely, 2^78484578 is an apocalyptic number.

78484578 is an abundant number, since it is smaller than the sum of its proper divisors (83843742).

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

78484578 is a wasteful number, since it uses less digits than its factorization.

78484578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082.

The product of its digits is 2007040, while the sum is 51.

The square root of 78484578 is about 8859.1522167756. The cubic root of 78484578 is about 428.1488440589.

The spelling of 78484578 in words is "seventy-eight million, four hundred eighty-four thousand, five hundred seventy-eight".