83140520 has 16 divisors (see below), whose sum is σ = 187066260. Its totient is φ = 33256192.

The previous prime is 83140493. The next prime is 83140529. The reversal of 83140520 is 2504138.

It can be written as a sum of positive squares in 2 ways, for example, as 79673476 + 3467044 = 8926^2 + 1862^2 .

It is not an unprimeable number, because it can be changed into a prime (83140529) 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, 1039217 + ... + 1039296.

Almost surely, 2^83140520 is an apocalyptic number.

It is an amenable number.

83140520 is an abundant number, since it is smaller than the sum of its proper divisors (103925740).

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

83140520 is a wasteful number, since it uses less digits than its factorization.

83140520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078524 (or 2078520 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 83140520 is about 9118.1423546685. The cubic root of 83140520 is about 436.4530962943.

Adding to 83140520 its reverse (2504138), we get a palindrome (85644658).

The spelling of 83140520 in words is "eighty-three million, one hundred forty thousand, five hundred twenty".