78822736 has 20 divisors (see below), whose sum is σ = 155224564. Its totient is φ = 38764800.

The previous prime is 78822721. The next prime is 78822743. The reversal of 78822736 is 63722887.

It can be written as a sum of positive squares in 2 ways, for example, as 9000000 + 69822736 = 3000^2 + 8356^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78822692 and 78822701.

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, 39405 + ... + 41356.

Almost surely, 2^78822736 is an apocalyptic number.

It is an amenable number.

78822736 is a deficient number, since it is larger than the sum of its proper divisors (76401828).

78822736 is a wasteful number, since it uses less digits than its factorization.

78822736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80830 (or 80824 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The square root of 78822736 is about 8878.2169381019. The cubic root of 78822736 is about 428.7628692230.

The spelling of 78822736 in words is "seventy-eight million, eight hundred twenty-two thousand, seven hundred thirty-six".