78780886 has 8 divisors (see below), whose sum is σ = 118445544. Its totient is φ = 39299040.

The previous prime is 78780869. The next prime is 78780887. The reversal of 78780886 is 68808787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78780887) by changing a digit.

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, 44620 + ... + 46351.

It is an arithmetic number, because the mean of its divisors is an integer number (14805693).

Almost surely, 2^78780886 is an apocalyptic number.

78780886 is a deficient number, since it is larger than the sum of its proper divisors (39664658).

78780886 is a wasteful number, since it uses less digits than its factorization.

78780886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91406.

The product of its (nonzero) digits is 1204224, while the sum is 52.

The square root of 78780886 is about 8875.8597330061. The cubic root of 78780886 is about 428.6869735970.

The spelling of 78780886 in words is "seventy-eight million, seven hundred eighty thousand, eight hundred eighty-six".