82439370 has 80 divisors (see below), whose sum is σ = 238752360. Its totient is φ = 20290176.

The previous prime is 82439351. The next prime is 82439377. The reversal of 82439370 is 7393428.

It can be written as a sum of positive squares in 4 ways, for example, as 34539129 + 47900241 = 5877^2 + 6921^2 .

It is not an unprimeable number, because it can be changed into a prime (82439377) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6616 + ... + 14444.

Almost surely, 2^82439370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82439370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119376180).

82439370 is an abundant number, since it is smaller than the sum of its proper divisors (156312990).

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

82439370 is a wasteful number, since it uses less digits than its factorization.

82439370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7861 (or 7852 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 82439370 is about 9079.6128772101. The cubic root of 82439370 is about 435.2227159164. Note that the first 3 decimals are identical.

The spelling of 82439370 in words is "eighty-two million, four hundred thirty-nine thousand, three hundred seventy".