82578578 has 16 divisors (see below), whose sum is σ = 125272320. Its totient is φ = 40824000.

The previous prime is 82578569. The next prime is 82578593. The reversal of 82578578 is 87587528.

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, 81338 + ... + 82346.

It is an arithmetic number, because the mean of its divisors is an integer number (7829520).

Almost surely, 2^82578578 is an apocalyptic number.

82578578 is a deficient number, since it is larger than the sum of its proper divisors (42693742).

82578578 is a wasteful number, since it uses less digits than its factorization.

82578578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433.

The product of its digits is 1254400, while the sum is 50.

The square root of 82578578 is about 9087.2756093342. The cubic root of 82578578 is about 435.4675520647.

The spelling of 82578578 in words is "eighty-two million, five hundred seventy-eight thousand, five hundred seventy-eight".