71140816 has 20 divisors (see below), whose sum is σ = 138356100. Its totient is φ = 35436032.

The previous prime is 71140813. The next prime is 71140829. The reversal of 71140816 is 61804117.

It can be written as a sum of positive squares in 2 ways, for example, as 33686416 + 37454400 = 5804^2 + 6120^2 .

It is a super-2 number, since 2×71140816² = 10122031402291712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71140813) 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, 3961 + ... + 12568.

It is an arithmetic number, because the mean of its divisors is an integer number (6917805).

Almost surely, 2^71140816 is an apocalyptic number.

It is an amenable number.

71140816 is a deficient number, since it is larger than the sum of its proper divisors (67215284).

71140816 is a wasteful number, since it uses less digits than its factorization.

71140816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16806 (or 16800 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 71140816 is about 8434.5015264685. The cubic root of 71140816 is about 414.3553469276.

The spelling of 71140816 in words is "seventy-one million, one hundred forty thousand, eight hundred sixteen".