71688590 has 8 divisors (see below), whose sum is σ = 129039480. Its totient is φ = 28675432.

The previous prime is 71688569. The next prime is 71688601. The reversal of 71688590 is 9588617.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3584420 + ... + 3584439.

It is an arithmetic number, because the mean of its divisors is an integer number (16129935).

Almost surely, 2^71688590 is an apocalyptic number.

71688590 is a deficient number, since it is larger than the sum of its proper divisors (57350890).

71688590 is a wasteful number, since it uses less digits than its factorization.

71688590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7168866.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 71688590 is about 8466.9114794003. The cubic root of 71688590 is about 415.4161210583.

The spelling of 71688590 in words is "seventy-one million, six hundred eighty-eight thousand, five hundred ninety".