78612278 has 16 divisors (see below), whose sum is σ = 119598336. Its totient is φ = 38749800.

The previous prime is 78612277. The next prime is 78612283. The reversal of 78612278 is 87221687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78612271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53453 + ... + 54903.

It is an arithmetic number, because the mean of its divisors is an integer number (7474896).

Almost surely, 2^78612278 is an apocalyptic number.

78612278 is a deficient number, since it is larger than the sum of its proper divisors (40986058).

78612278 is a wasteful number, since it uses less digits than its factorization.

78612278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819.

The product of its digits is 75264, while the sum is 41.

The square root of 78612278 is about 8866.3565233979. The cubic root of 78612278 is about 428.3809277896.

The spelling of 78612278 in words is "seventy-eight million, six hundred twelve thousand, two hundred seventy-eight".