71868646 has 8 divisors (see below), whose sum is σ = 109279944. Its totient is φ = 35442000.

The previous prime is 71868637. The next prime is 71868649. The reversal of 71868646 is 64686817.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 71868596 and 71868605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71868649) 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, 245980 + ... + 246271.

It is an arithmetic number, because the mean of its divisors is an integer number (13659993).

Almost surely, 2^71868646 is an apocalyptic number.

71868646 is a deficient number, since it is larger than the sum of its proper divisors (37411298).

71868646 is a wasteful number, since it uses less digits than its factorization.

71868646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492326.

The product of its digits is 387072, while the sum is 46.

The square root of 71868646 is about 8477.5377321484. The cubic root of 71868646 is about 415.7636223380.

The spelling of 71868646 in words is "seventy-one million, eight hundred sixty-eight thousand, six hundred forty-six".