82646257 has 12 divisors (see below), whose sum is σ = 89099136. Its totient is φ = 76614840.

The previous prime is 82646243. The next prime is 82646261. The reversal of 82646257 is 75264628.

It is not a de Polignac number, because 82646257 - 2¹¹ = 82644209 is a prime.

It is a super-2 number, since 2×82646257² = 13660807592220098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82646237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14532 + ... + 19402.

It is an arithmetic number, because the mean of its divisors is an integer number (7424928).

Almost surely, 2^82646257 is an apocalyptic number.

It is an amenable number.

82646257 is a deficient number, since it is larger than the sum of its proper divisors (6452879).

82646257 is a wasteful number, since it uses less digits than its factorization.

82646257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4956 (or 4937 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 82646257 is about 9090.9986800131. The cubic root of 82646257 is about 435.5864850914.

The spelling of 82646257 in words is "eighty-two million, six hundred forty-six thousand, two hundred fifty-seven".