78769436 has 6 divisors (see below), whose sum is σ = 137846520. Its totient is φ = 39384716.

The previous prime is 78769403. The next prime is 78769447. The reversal of 78769436 is 63496787.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9846176 + ... + 9846183.

It is an arithmetic number, because the mean of its divisors is an integer number (22974420).

Almost surely, 2^78769436 is an apocalyptic number.

It is an amenable number.

78769436 is a deficient number, since it is larger than the sum of its proper divisors (59077084).

78769436 is a wasteful number, since it uses less digits than its factorization.

78769436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19692363 (or 19692361 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 50.

The square root of 78769436 is about 8875.2147016283. The cubic root of 78769436 is about 428.6662041612. Note that the first 3 decimals are identical.

The spelling of 78769436 in words is "seventy-eight million, seven hundred sixty-nine thousand, four hundred thirty-six".