78779752 has 16 divisors (see below), whose sum is σ = 148290660. Its totient is φ = 39235584.

The previous prime is 78779671. The next prime is 78779777. The reversal of 78779752 is 25797787.

It can be written as a sum of positive squares in 2 ways, for example, as 66487716 + 12292036 = 8154^2 + 3506^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78779752.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17103 + ... + 21214.

Almost surely, 2^78779752 is an apocalyptic number.

It is an amenable number.

78779752 is a deficient number, since it is larger than the sum of its proper divisors (69510908).

78779752 is a wasteful number, since it uses less digits than its factorization.

78779752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38580 (or 38576 counting only the distinct ones).

The product of its digits is 1728720, while the sum is 52.

The square root of 78779752 is about 8875.7958516406. The cubic root of 78779752 is about 428.6849166964.

The spelling of 78779752 in words is "seventy-eight million, seven hundred seventy-nine thousand, seven hundred fifty-two".