82776628 has 24 divisors (see below), whose sum is σ = 160259904. Its totient is φ = 37094400.

The previous prime is 82776623. The next prime is 82776649. The reversal of 82776628 is 82667728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82776623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10125 + ... + 16372.

It is an arithmetic number, because the mean of its divisors is an integer number (6677496).

Almost surely, 2^82776628 is an apocalyptic number.

It is an amenable number.

82776628 is a deficient number, since it is larger than the sum of its proper divisors (77483276).

82776628 is a wasteful number, since it uses less digits than its factorization.

82776628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26583 (or 26581 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 82776628 is about 9098.1661888537. The cubic root of 82776628 is about 435.8154045597.

Subtracting from 82776628 its reverse (82667728), we obtain a square (108900 = 330²).

The spelling of 82776628 in words is "eighty-two million, seven hundred seventy-six thousand, six hundred twenty-eight".