71989746 has 32 divisors (see below), whose sum is σ = 152053440. Its totient is φ = 22659264.

The previous prime is 71989739. The next prime is 71989751. The reversal of 71989746 is 64798917.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41676 + ... + 43368.

It is an arithmetic number, because the mean of its divisors is an integer number (4751670).

Almost surely, 2^71989746 is an apocalyptic number.

71989746 is an abundant number, since it is smaller than the sum of its proper divisors (80063694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71989746 is a wasteful number, since it uses less digits than its factorization.

71989746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090.

The product of its digits is 762048, while the sum is 51.

The square root of 71989746 is about 8484.6771299797. The cubic root of 71989746 is about 415.9970144325.

The spelling of 71989746 in words is "seventy-one million, nine hundred eighty-nine thousand, seven hundred forty-six".