83371640 has 64 divisors (see below), whose sum is σ = 207036000. Its totient is φ = 29962240.

The previous prime is 83371627. The next prime is 83371643. The reversal of 83371640 is 4617338.

83371640 = T₃₇₆ + T₃₇₇ + ... + T₈₂₀.

It is a junction number, because it is equal to n+sod(n) for n = 83371597 and 83371606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83371643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 38096 + ... + 40224.

Almost surely, 2^83371640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83371640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103518000).

83371640 is an abundant number, since it is smaller than the sum of its proper divisors (123664360).

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

83371640 is a wasteful number, since it uses less digits than its factorization.

83371640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 83371640 is about 9130.8071932332. The cubic root of 83371640 is about 436.8571500270.

Adding to 83371640 its reverse (4617338), we get a palindrome (87988978).

The spelling of 83371640 in words is "eighty-three million, three hundred seventy-one thousand, six hundred forty".