79221378 has 8 divisors (see below), whose sum is σ = 158442768. Its totient is φ = 26407124.

The previous prime is 79221323. The next prime is 79221397. The reversal of 79221378 is 87312297.

It is a sphenic number, since it is the product of 3 distinct primes.

79221378 is an admirable number.

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 in 3 ways as a sum of consecutive naturals, for example, 6601776 + ... + 6601787.

It is an arithmetic number, because the mean of its divisors is an integer number (19805346).

Almost surely, 2^79221378 is an apocalyptic number.

79221378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79221378 is a wasteful number, since it uses less digits than its factorization.

79221378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13203568.

The product of its digits is 42336, while the sum is 39.

The square root of 79221378 is about 8900.6391905301. The cubic root of 79221378 is about 429.4844696082.

The spelling of 79221378 in words is "seventy-nine million, two hundred twenty-one thousand, three hundred seventy-eight".