78555474 has 16 divisors (see below), whose sum is σ = 174567840. Its totient is φ = 26185140.

The previous prime is 78555437. The next prime is 78555479. The reversal of 78555474 is 47455587.

It is not an unprimeable number, because it can be changed into a prime (78555479) 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, 727312 + ... + 727419.

It is an arithmetic number, because the mean of its divisors is an integer number (10910490).

Almost surely, 2^78555474 is an apocalyptic number.

78555474 is an abundant number, since it is smaller than the sum of its proper divisors (96012366).

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

78555474 is a wasteful number, since it uses less digits than its factorization.

78555474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454742 (or 1454736 counting only the distinct ones).

The product of its digits is 784000, while the sum is 45.

The square root of 78555474 is about 8863.1525993858. The cubic root of 78555474 is about 428.2777224793.

The spelling of 78555474 in words is "seventy-eight million, five hundred fifty-five thousand, four hundred seventy-four".