78612434 has 8 divisors (see below), whose sum is σ = 117975180. Its totient is φ = 39287376.

The previous prime is 78612433. The next prime is 78612439. The reversal of 78612434 is 43421687.

It can be written as a sum of positive squares in 2 ways, for example, as 77704225 + 908209 = 8815^2 + 953^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 78612394 and 78612403.

It is not an unprimeable number, because it can be changed into a prime (78612433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3449 + ... + 13004.

Almost surely, 2^78612434 is an apocalyptic number.

78612434 is a deficient number, since it is larger than the sum of its proper divisors (39362746).

78612434 is a wasteful number, since it uses less digits than its factorization.

78612434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18844.

The product of its digits is 32256, while the sum is 35.

The square root of 78612434 is about 8866.3653206937. The cubic root of 78612434 is about 428.3812111524.

The spelling of 78612434 in words is "seventy-eight million, six hundred twelve thousand, four hundred thirty-four".