82421898 has 32 divisors (see below), whose sum is σ = 177883776. Its totient is φ = 25309248.

The previous prime is 82421893. The next prime is 82421917. The reversal of 82421898 is 89812428.

It is not an unprimeable number, because it can be changed into a prime (82421893) 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, 59611 + ... + 60977.

It is an arithmetic number, because the mean of its divisors is an integer number (5558868).

Almost surely, 2^82421898 is an apocalyptic number.

82421898 is an abundant number, since it is smaller than the sum of its proper divisors (95461878).

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

82421898 is a wasteful number, since it uses less digits than its factorization.

82421898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158.

The product of its digits is 73728, while the sum is 42.

The square root of 82421898 is about 9078.6506706669. The cubic root of 82421898 is about 435.1919670620.

It can be divided in two parts, 824 and 21898, that added together give a palindrome (22722).

The spelling of 82421898 in words is "eighty-two million, four hundred twenty-one thousand, eight hundred ninety-eight".