78669436 has 12 divisors (see below), whose sum is σ = 137755800. Its totient is φ = 39310640.

The previous prime is 78669427. The next prime is 78669439. The reversal of 78669436 is 63496687.

It is a self number, because there is not a number n which added to its sum of digits gives 78669436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78669439) 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, 2751 + ... + 12841.

It is an arithmetic number, because the mean of its divisors is an integer number (11479650).

Almost surely, 2^78669436 is an apocalyptic number.

It is an amenable number.

78669436 is a deficient number, since it is larger than the sum of its proper divisors (59086364).

78669436 is a wasteful number, since it uses less digits than its factorization.

78669436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12044 (or 12042 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The square root of 78669436 is about 8869.5792459395. The cubic root of 78669436 is about 428.4847261010.

The spelling of 78669436 in words is "seventy-eight million, six hundred sixty-nine thousand, four hundred thirty-six".