71840361 has 8 divisors (see below), whose sum is σ = 98877184. Its totient is φ = 46348560.

The previous prime is 71840359. The next prime is 71840369. The reversal of 71840361 is 16304817.

It is a happy number.

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

It is not a de Polignac number, because 71840361 - 2¹ = 71840359 is a prime.

It is a super-2 number, since 2×71840361² = 10322074937220642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71840369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386146 + ... + 386331.

It is an arithmetic number, because the mean of its divisors is an integer number (12359648).

Almost surely, 2^71840361 is an apocalyptic number.

It is an amenable number.

71840361 is a deficient number, since it is larger than the sum of its proper divisors (27036823).

71840361 is a wasteful number, since it uses less digits than its factorization.

71840361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772511.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 71840361 is about 8475.8693359442. The cubic root of 71840361 is about 415.7090718128.

The spelling of 71840361 in words is "seventy-one million, eight hundred forty thousand, three hundred sixty-one".