82078434 has 40 divisors (see below), whose sum is σ = 185739840. Its totient is φ = 27088344.

The previous prime is 82078429. The next prime is 82078457. The reversal of 82078434 is 43487028.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14227 + ... + 19145.

It is an arithmetic number, because the mean of its divisors is an integer number (4643496).

Almost surely, 2^82078434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82078434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92869920).

82078434 is an abundant number, since it is smaller than the sum of its proper divisors (103661406).

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

82078434 is a wasteful number, since it uses less digits than its factorization.

82078434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036 (or 5027 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 82078434 is about 9059.7148961764. The cubic root of 82078434 is about 434.5866227529.

It can be divided in two parts, 8207 and 8434, that added together give a square (16641 = 129²).

The spelling of 82078434 in words is "eighty-two million, seventy-eight thousand, four hundred thirty-four".