82643340 has 48 divisors (see below), whose sum is σ = 249203808. Its totient is φ = 20342784.

The previous prime is 82643339. The next prime is 82643371. The reversal of 82643340 is 4334628.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 82643298 and 82643307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52197 + ... + 53756.

It is an arithmetic number, because the mean of its divisors is an integer number (5191746).

Almost surely, 2^82643340 is an apocalyptic number.

It is an amenable number.

82643340 is an abundant number, since it is smaller than the sum of its proper divisors (166560468).

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

82643340 is a wasteful number, since it uses less digits than its factorization.

82643340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105978 (or 105976 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 82643340 is about 9090.8382451785. The cubic root of 82643340 is about 435.5813603555.

Adding to 82643340 its reverse (4334628), we get a palindrome (86977968).

The spelling of 82643340 in words is "eighty-two million, six hundred forty-three thousand, three hundred forty".