82157744 has 20 divisors (see below), whose sum is σ = 160729296. Its totient is φ = 40679232.

The previous prime is 82157737. The next prime is 82157773. The reversal of 82157744 is 44775128.

It is a junction number, because it is equal to n+sod(n) for n = 82157698 and 82157707.

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 3 ways as a sum of consecutive naturals, for example, 23279 + ... + 26574.

Almost surely, 2^82157744 is an apocalyptic number.

It is an amenable number.

82157744 is a deficient number, since it is larger than the sum of its proper divisors (78571552).

82157744 is a wasteful number, since it uses less digits than its factorization.

82157744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49964 (or 49958 counting only the distinct ones).

The product of its digits is 62720, while the sum is 38.

The square root of 82157744 is about 9064.0909086350. The cubic root of 82157744 is about 434.7265538238.

The spelling of 82157744 in words is "eighty-two million, one hundred fifty-seven thousand, seven hundred forty-four".