78530422 has 4 divisors (see below), whose sum is σ = 117795636. Its totient is φ = 39265210.

The previous prime is 78530399. The next prime is 78530437. The reversal of 78530422 is 22403587.

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

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19632604 + ... + 19632607.

It is an arithmetic number, because the mean of its divisors is an integer number (29448909).

Almost surely, 2^78530422 is an apocalyptic number.

78530422 is a deficient number, since it is larger than the sum of its proper divisors (39265214).

78530422 is a wasteful number, since it uses less digits than its factorization.

78530422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39265213.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 78530422 is about 8861.7392198146. The cubic root of 78530422 is about 428.2321905187.

The spelling of 78530422 in words is "seventy-eight million, five hundred thirty thousand, four hundred twenty-two".