82157732 has 6 divisors (see below), whose sum is σ = 143776038. Its totient is φ = 41078864.

The previous prime is 82157731. The next prime is 82157737. The reversal of 82157732 is 23775128.

It can be written as a sum of positive squares in only one way, i.e., 78570496 + 3587236 = 8864^2 + 1894^2 .

It is a junction number, because it is equal to n+sod(n) for n = 82157692 and 82157701.

It is not an unprimeable number, because it can be changed into a prime (82157731) 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 as a sum of consecutive naturals, namely, 10269713 + ... + 10269720.

It is an arithmetic number, because the mean of its divisors is an integer number (23962673).

Almost surely, 2^82157732 is an apocalyptic number.

It is an amenable number.

82157732 is a deficient number, since it is larger than the sum of its proper divisors (61618306).

82157732 is a wasteful number, since it uses less digits than its factorization.

82157732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20539437 (or 20539435 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 82157732 is about 9064.0902466822. The cubic root of 82157732 is about 434.7265326583.

The spelling of 82157732 in words is "eighty-two million, one hundred fifty-seven thousand, seven hundred thirty-two".