78441236 has 12 divisors (see below), whose sum is σ = 138095328. Its totient is φ = 38985432.

The previous prime is 78441203. The next prime is 78441257. The reversal of 78441236 is 63214487.

It is a junction number, because it is equal to n+sod(n) for n = 78441196 and 78441205.

It is a congruent number.

It is an unprimeable number.

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, 58046 + ... + 59381.

It is an arithmetic number, because the mean of its divisors is an integer number (11507944).

Almost surely, 2^78441236 is an apocalyptic number.

It is an amenable number.

78441236 is a deficient number, since it is larger than the sum of its proper divisors (59654092).

78441236 is a wasteful number, since it uses less digits than its factorization.

78441236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117598 (or 117596 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 78441236 is about 8856.7057081061. The cubic root of 78441236 is about 428.0700164954.

The spelling of 78441236 in words is "seventy-eight million, four hundred forty-one thousand, two hundred thirty-six".