82406138 has 8 divisors (see below), whose sum is σ = 123912660. Its totient is φ = 41101920.

The previous prime is 82406131. The next prime is 82406147. The reversal of 82406138 is 83160428.

It can be written as a sum of positive squares in 2 ways, for example, as 78552769 + 3853369 = 8863^2 + 1963^2 .

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

It is not an unprimeable number, because it can be changed into a prime (82406131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49553 + ... + 51188.

Almost surely, 2^82406138 is an apocalyptic number.

82406138 is a deficient number, since it is larger than the sum of its proper divisors (41506522).

82406138 is a wasteful number, since it uses less digits than its factorization.

82406138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101152.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 82406138 is about 9077.7826587774. The cubic root of 82406138 is about 435.1642274169.

The spelling of 82406138 in words is "eighty-two million, four hundred six thousand, one hundred thirty-eight".