78422242 has 4 divisors (see below), whose sum is σ = 117633366. Its totient is φ = 39211120.

The previous prime is 78422237. The next prime is 78422287. The reversal of 78422242 is 24222487.

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., 56715961 + 21706281 = 7531^2 + 4659^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19605559 + ... + 19605562.

Almost surely, 2^78422242 is an apocalyptic number.

78422242 is a deficient number, since it is larger than the sum of its proper divisors (39211124).

78422242 is a wasteful number, since it uses less digits than its factorization.

78422242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39211123.

The product of its digits is 14336, while the sum is 31.

The square root of 78422242 is about 8855.6333483269. The cubic root of 78422242 is about 428.0354623134.

The spelling of 78422242 in words is "seventy-eight million, four hundred twenty-two thousand, two hundred forty-two".