82641784 has 16 divisors (see below), whose sum is σ = 159952320. Its totient is φ = 39987840.

The previous prime is 82641761. The next prime is 82641803. The reversal of 82641784 is 48714628.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 166369 + ... + 166864.

It is an arithmetic number, because the mean of its divisors is an integer number (9997020).

Almost surely, 2^82641784 is an apocalyptic number.

It is an amenable number.

82641784 is a deficient number, since it is larger than the sum of its proper divisors (77310536).

82641784 is a wasteful number, since it uses less digits than its factorization.

82641784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333270 (or 333266 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 82641784 is about 9090.7526641087. The cubic root of 82641784 is about 435.5786266452.

The spelling of 82641784 in words is "eighty-two million, six hundred forty-one thousand, seven hundred eighty-four".