71853140 has 12 divisors (see below), whose sum is σ = 150891636. Its totient is φ = 28741248.

The previous prime is 71853139. The next prime is 71853143. The reversal of 71853140 is 4135817.

It can be written as a sum of positive squares in 2 ways, for example, as 52475536 + 19377604 = 7244^2 + 4402^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71853143) 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, 1796309 + ... + 1796348.

It is an arithmetic number, because the mean of its divisors is an integer number (12574303).

Almost surely, 2^71853140 is an apocalyptic number.

It is an amenable number.

71853140 is an abundant number, since it is smaller than the sum of its proper divisors (79038496).

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

71853140 is a wasteful number, since it uses less digits than its factorization.

71853140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592666 (or 3592664 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 71853140 is about 8476.6231484005. The cubic root of 71853140 is about 415.7337191985.

Adding to 71853140 its reverse (4135817), we get a palindrome (75988957).

The spelling of 71853140 in words is "seventy-one million, eight hundred fifty-three thousand, one hundred forty".