79420028 has 6 divisors (see below), whose sum is σ = 138985056. Its totient is φ = 39710012.

The previous prime is 79420007. The next prime is 79420031. The reversal of 79420028 is 82002497.

It is a junction number, because it is equal to n+sod(n) for n = 79419976 and 79420003.

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, 9927500 + ... + 9927507.

It is an arithmetic number, because the mean of its divisors is an integer number (23164176).

Almost surely, 2^79420028 is an apocalyptic number.

It is an amenable number.

79420028 is a deficient number, since it is larger than the sum of its proper divisors (59565028).

79420028 is a wasteful number, since it uses less digits than its factorization.

79420028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19855011 (or 19855009 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 79420028 is about 8911.7915146170. The cubic root of 79420028 is about 429.8431517362.

The spelling of 79420028 in words is "seventy-nine million, four hundred twenty thousand, twenty-eight".