78555436 has 24 divisors (see below), whose sum is σ = 145862640. Its totient is φ = 36890112.

The previous prime is 78555413. The next prime is 78555437. The reversal of 78555436 is 63455587.

It is a junction number, because it is equal to n+sod(n) for n = 78555392 and 78555401.

It is not an unprimeable number, because it can be changed into a prime (78555437) 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, 43936 + ... + 45688.

It is an arithmetic number, because the mean of its divisors is an integer number (6077610).

Almost surely, 2^78555436 is an apocalyptic number.

It is an amenable number.

78555436 is a deficient number, since it is larger than the sum of its proper divisors (67307204).

78555436 is a wasteful number, since it uses less digits than its factorization.

78555436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433 (or 2431 counting only the distinct ones).

The product of its digits is 504000, while the sum is 43.

The square root of 78555436 is about 8863.1504556788. The cubic root of 78555436 is about 428.2776534217.

The spelling of 78555436 in words is "seventy-eight million, five hundred fifty-five thousand, four hundred thirty-six".