82387728 has 30 divisors (see below), whose sum is σ = 230571614. Its totient is φ = 27462528.

The previous prime is 82387717. The next prime is 82387769. The reversal of 82387728 is 82778328.

It can be written as a sum of positive squares in only one way, i.e., 75481344 + 6906384 = 8688^2 + 2628^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 285925 + ... + 286212.

Almost surely, 2^82387728 is an apocalyptic number.

It is an amenable number.

82387728 is an abundant number, since it is smaller than the sum of its proper divisors (148183886).

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

82387728 is a wasteful number, since it uses less digits than its factorization.

82387728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572151 (or 572142 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 82387728 is about 9076.7685879943. The cubic root of 82387728 is about 435.1318189487.

The spelling of 82387728 in words is "eighty-two million, three hundred eighty-seven thousand, seven hundred twenty-eight".