82576778 has 16 divisors (see below), whose sum is σ = 125125440. Its totient is φ = 40870656.

The previous prime is 82576771. The next prime is 82576789. The reversal of 82576778 is 87767528.

It is a super-2 number, since 2×82576778² = 13637848529722568, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82576771) by changing a digit.

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, 142826 + ... + 143402.

It is an arithmetic number, because the mean of its divisors is an integer number (7820340).

Almost surely, 2^82576778 is an apocalyptic number.

82576778 is a deficient number, since it is larger than the sum of its proper divisors (42548662).

82576778 is a wasteful number, since it uses less digits than its factorization.

82576778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181.

The product of its digits is 1317120, while the sum is 50.

The square root of 82576778 is about 9087.1765692100. The cubic root of 82576778 is about 435.4643880186.

The spelling of 82576778 in words is "eighty-two million, five hundred seventy-six thousand, seven hundred seventy-eight".