78740422 has 4 divisors (see below), whose sum is σ = 118110636. Its totient is φ = 39370210.

The previous prime is 78740419. The next prime is 78740437. The reversal of 78740422 is 22404787.

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

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, 19685104 + ... + 19685107.

It is an arithmetic number, because the mean of its divisors is an integer number (29527659).

Almost surely, 2^78740422 is an apocalyptic number.

78740422 is a deficient number, since it is larger than the sum of its proper divisors (39370214).

78740422 is a wasteful number, since it uses less digits than its factorization.

78740422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39370213.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 78740422 is about 8873.5799990759. The cubic root of 78740422 is about 428.6135659416.

It can be divided in two parts, 787 and 40422, that added together give a square (41209 = 203²).

The spelling of 78740422 in words is "seventy-eight million, seven hundred forty thousand, four hundred twenty-two".