82202640 has 80 divisors (see below), whose sum is σ = 274440768. Its totient is φ = 20233728.

The previous prime is 82202597. The next prime is 82202647. The reversal of 82202640 is 4620228.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 82202640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82202647) 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, 10054 + ... + 16293.

Almost surely, 2^82202640 is an apocalyptic number.

82202640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82202640 is an abundant number, since it is smaller than the sum of its proper divisors (192238128).

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

82202640 is a wasteful number, since it uses less digits than its factorization.

82202640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26376 (or 26370 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 82202640 is about 9066.5671563167. The cubic root of 82202640 is about 434.8057264346.

Adding to 82202640 its reverse (4620228), we get a palindrome (86822868).

The spelling of 82202640 in words is "eighty-two million, two hundred two thousand, six hundred forty".