71688346 has 8 divisors (see below), whose sum is σ = 107782164. Its totient is φ = 35760960.

The previous prime is 71688341. The next prime is 71688347. The reversal of 71688346 is 64388617.

It can be written as a sum of positive squares in 2 ways, for example, as 58446025 + 13242321 = 7645^2 + 3639^2 .

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

It is not an unprimeable number, because it can be changed into a prime (71688341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40525 + ... + 42256.

Almost surely, 2^71688346 is an apocalyptic number.

71688346 is a deficient number, since it is larger than the sum of its proper divisors (36093818).

71688346 is a wasteful number, since it uses less digits than its factorization.

71688346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83216.

The product of its digits is 193536, while the sum is 43.

The square root of 71688346 is about 8466.8970703558. The cubic root of 71688346 is about 415.4156497530.

The spelling of 71688346 in words is "seventy-one million, six hundred eighty-eight thousand, three hundred forty-six".