82729857 has 16 divisors (see below), whose sum is σ = 132700160. Its totient is φ = 44785872.

The previous prime is 82729853. The next prime is 82729877. The reversal of 82729857 is 75892728.

It is not a de Polignac number, because 82729857 - 2² = 82729853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82729853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103273 + ... + 104070.

It is an arithmetic number, because the mean of its divisors is an integer number (8293760).

Almost surely, 2^82729857 is an apocalyptic number.

It is an amenable number.

82729857 is a deficient number, since it is larger than the sum of its proper divisors (49970303).

82729857 is a wasteful number, since it uses less digits than its factorization.

82729857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207372.

The product of its digits is 564480, while the sum is 48.

The square root of 82729857 is about 9095.5954725350. The cubic root of 82729857 is about 435.7333066574.

The spelling of 82729857 in words is "eighty-two million, seven hundred twenty-nine thousand, eight hundred fifty-seven".