78423194 has 8 divisors (see below), whose sum is σ = 117673140. Its totient is φ = 39198816.

The previous prime is 78423187. The next prime is 78423197. The reversal of 78423194 is 49132487.

It can be written as a sum of positive squares in 2 ways, for example, as 78092569 + 330625 = 8837^2 + 575^2 .

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

It is not an unprimeable number, because it can be changed into a prime (78423197) 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, 6392 + ... + 14060.

Almost surely, 2^78423194 is an apocalyptic number.

78423194 is a deficient number, since it is larger than the sum of its proper divisors (39249946).

78423194 is a wasteful number, since it uses less digits than its factorization.

78423194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12784.

The product of its digits is 48384, while the sum is 38.

The square root of 78423194 is about 8855.6870992600. The cubic root of 78423194 is about 428.0371943395.

The spelling of 78423194 in words is "seventy-eight million, four hundred twenty-three thousand, one hundred ninety-four".