79684438 has 4 divisors (see below), whose sum is σ = 119526660. Its totient is φ = 39842218.

The previous prime is 79684427. The next prime is 79684441. The reversal of 79684438 is 83448697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83448697 = 467 ⋅178691.

It is a junction number, because it is equal to n+sod(n) for n = 79684391 and 79684400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19921108 + ... + 19921111.

It is an arithmetic number, because the mean of its divisors is an integer number (29881665).

Almost surely, 2^79684438 is an apocalyptic number.

79684438 is a deficient number, since it is larger than the sum of its proper divisors (39842222).

79684438 is a wasteful number, since it uses less digits than its factorization.

79684438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39842221.

The product of its digits is 1161216, while the sum is 49.

The square root of 79684438 is about 8926.6140277263. The cubic root of 79684438 is about 430.3196433489.

The spelling of 79684438 in words is "seventy-nine million, six hundred eighty-four thousand, four hundred thirty-eight".