78880113 has 12 divisors (see below), whose sum is σ = 122702580. Its totient is φ = 48541536.

The previous prime is 78880111. The next prime is 78880117. The reversal of 78880113 is 31108887.

It can be written as a sum of positive squares in 2 ways, for example, as 19158129 + 59721984 = 4377^2 + 7728^2 .

It is not a de Polignac number, because 78880113 - 2¹ = 78880111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78880111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336978 + ... + 337211.

It is an arithmetic number, because the mean of its divisors is an integer number (10225215).

Almost surely, 2^78880113 is an apocalyptic number.

It is an amenable number.

78880113 is a deficient number, since it is larger than the sum of its proper divisors (43822467).

78880113 is a wasteful number, since it uses less digits than its factorization.

78880113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674208 (or 674205 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 78880113 is about 8881.4476860476. The cubic root of 78880113 is about 428.8668796543.

The spelling of 78880113 in words is "seventy-eight million, eight hundred eighty thousand, one hundred thirteen".