71643442 has 16 divisors (see below), whose sum is σ = 117129600. Its totient is φ = 32666832.

The previous prime is 71643437. The next prime is 71643499. The reversal of 71643442 is 24434617.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14442 + ... + 18757.

It is an arithmetic number, because the mean of its divisors is an integer number (7320600).

Almost surely, 2^71643442 is an apocalyptic number.

71643442 is a deficient number, since it is larger than the sum of its proper divisors (45486158).

71643442 is a wasteful number, since it uses less digits than its factorization.

71643442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33297.

The product of its digits is 16128, while the sum is 31.

The square root of 71643442 is about 8464.2449161163. The cubic root of 71643442 is about 415.3288959010.

The spelling of 71643442 in words is "seventy-one million, six hundred forty-three thousand, four hundred forty-two".