79842728 has 32 divisors (see below), whose sum is σ = 173444160. Its totient is φ = 33747840.

The previous prime is 79842691. The next prime is 79842743. The reversal of 79842728 is 82724897.

It is a happy number.

It is a super-2 number, since 2×79842728² = 12749722428963968, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 5678 + ... + 13853.

It is an arithmetic number, because the mean of its divisors is an integer number (5420130).

Almost surely, 2^79842728 is an apocalyptic number.

It is an amenable number.

79842728 is an abundant number, since it is smaller than the sum of its proper divisors (93601432).

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

79842728 is a wasteful number, since it uses less digits than its factorization.

79842728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19617 (or 19613 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 79842728 is about 8935.4758127366. The cubic root of 79842728 is about 430.6043925629.

The spelling of 79842728 in words is "seventy-nine million, eight hundred forty-two thousand, seven hundred twenty-eight".