78344122 has 4 divisors (see below), whose sum is σ = 117516186. Its totient is φ = 39172060.

The previous prime is 78344093. The next prime is 78344129. The reversal of 78344122 is 22144387.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43309561 + 35034561 = 6581^2 + 5919^2 .

It is a super-2 number, since 2×78344122² = 12275602903901768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78344129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19586029 + ... + 19586032.

Almost surely, 2^78344122 is an apocalyptic number.

78344122 is a deficient number, since it is larger than the sum of its proper divisors (39172064).

78344122 is a wasteful number, since it uses less digits than its factorization.

78344122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39172063.

The product of its digits is 10752, while the sum is 31.

The square root of 78344122 is about 8851.2214976239. The cubic root of 78344122 is about 427.8932864939.

The spelling of 78344122 in words is "seventy-eight million, three hundred forty-four thousand, one hundred twenty-two".