78442226 has 8 divisors (see below), whose sum is σ = 119883564. Its totient is φ = 38481040.

The previous prime is 78442207. The next prime is 78442229. The reversal of 78442226 is 62224487.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72267001 + 6175225 = 8501^2 + 2485^2 .

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 (78442229) 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, 369905 + ... + 370116.

Almost surely, 2^78442226 is an apocalyptic number.

78442226 is a deficient number, since it is larger than the sum of its proper divisors (41441338).

78442226 is a wasteful number, since it uses less digits than its factorization.

78442226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740076.

The product of its digits is 43008, while the sum is 35.

The square root of 78442226 is about 8856.7615977851. The cubic root of 78442226 is about 428.0718173660.

The spelling of 78442226 in words is "seventy-eight million, four hundred forty-two thousand, two hundred twenty-six".