78157796 has 12 divisors (see below), whose sum is σ = 138031740. Its totient is φ = 38720160.

The previous prime is 78157769. The next prime is 78157817. The reversal of 78157796 is 69775187.

It can be written as a sum of positive squares in 2 ways, for example, as 48302500 + 29855296 = 6950^2 + 5464^2 .

It is a super-2 number, since 2×78157796² = 12217282151155232, which contains 22 as substring.

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, 89195 + ... + 90066.

It is an arithmetic number, because the mean of its divisors is an integer number (11502645).

Almost surely, 2^78157796 is an apocalyptic number.

It is an amenable number.

78157796 is a deficient number, since it is larger than the sum of its proper divisors (59873944).

78157796 is a wasteful number, since it uses less digits than its factorization.

78157796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179374 (or 179372 counting only the distinct ones).

The product of its digits is 740880, while the sum is 50.

The square root of 78157796 is about 8840.6897920920. The cubic root of 78157796 is about 427.5537973632.

The spelling of 78157796 in words is "seventy-eight million, one hundred fifty-seven thousand, seven hundred ninety-six".