82420818 has 8 divisors (see below), whose sum is σ = 164841648. Its totient is φ = 27473604.

The previous prime is 82420771. The next prime is 82420829. The reversal of 82420818 is 81802428.

It is a sphenic number, since it is the product of 3 distinct primes.

82420818 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6868396 + ... + 6868407.

It is an arithmetic number, because the mean of its divisors is an integer number (20605206).

Almost surely, 2^82420818 is an apocalyptic number.

82420818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

82420818 is a wasteful number, since it uses less digits than its factorization.

82420818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13736808.

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 82420818 is about 9078.5911902674. The cubic root of 82420818 is about 435.1900662347.

It can be divided in two parts, 82420 and 818, that added together give a palindrome (83238).

The spelling of 82420818 in words is "eighty-two million, four hundred twenty thousand, eight hundred eighteen".