79909438 has 8 divisors (see below), whose sum is σ = 136987632. Its totient is φ = 34246896.

The previous prime is 79909433. The next prime is 79909441. The reversal of 79909438 is 83490997.

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

It is a junction number, because it is equal to n+sod(n) for n = 79909391 and 79909400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79909433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2853895 + ... + 2853922.

It is an arithmetic number, because the mean of its divisors is an integer number (17123454).

Almost surely, 2^79909438 is an apocalyptic number.

79909438 is a deficient number, since it is larger than the sum of its proper divisors (57078194).

79909438 is a wasteful number, since it uses less digits than its factorization.

79909438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5707826.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 79909438 is about 8939.2079067443. The cubic root of 79909438 is about 430.7242850198.

The spelling of 79909438 in words is "seventy-nine million, nine hundred nine thousand, four hundred thirty-eight".