82640260 has 24 divisors (see below), whose sum is σ = 174375936. Its totient is φ = 32897760.

The previous prime is 82640251. The next prime is 82640263. The reversal of 82640260 is 6204628.

82640260 = T₇₄₂₁ + T₇₄₂₂ + T₇₄₂₃.

82640260 is nontrivially palindromic in base 14.

It is not an unprimeable number, because it can be changed into a prime (82640263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5572 + ... + 14011.

It is an arithmetic number, because the mean of its divisors is an integer number (7265664).

Almost surely, 2^82640260 is an apocalyptic number.

82640260 is the 7423-rd centered triangular number.

It is an amenable number.

82640260 is an abundant number, since it is smaller than the sum of its proper divisors (91735676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82640260 is a wasteful number, since it uses less digits than its factorization.

82640260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19803 (or 19801 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 82640260 is about 9090.6688422800. The cubic root of 82640260 is about 435.5759491219.

Adding to 82640260 its reverse (6204628), we get a palindrome (88844888).

The spelling of 82640260 in words is "eighty-two million, six hundred forty thousand, two hundred sixty".