82578258 has 32 divisors (see below), whose sum is σ = 209723520. Its totient is φ = 23593680.

The previous prime is 82578239. The next prime is 82578269. The reversal of 82578258 is 85287528.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108853 + ... + 109608.

It is an arithmetic number, because the mean of its divisors is an integer number (6553860).

Almost surely, 2^82578258 is an apocalyptic number.

82578258 is an abundant number, since it is smaller than the sum of its proper divisors (127145262).

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

82578258 is a wasteful number, since it uses less digits than its factorization.

82578258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218479 (or 218473 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 82578258 is about 9087.2580022799. The cubic root of 82578258 is about 435.4669895710.

The spelling of 82578258 in words is "eighty-two million, five hundred seventy-eight thousand, two hundred fifty-eight".