71988434 has 16 divisors (see below), whose sum is σ = 124972800. Its totient is φ = 30461184.

The previous prime is 71988409. The next prime is 71988467. The reversal of 71988434 is 43488917.

It is a Curzon number.

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, 31439 + ... + 33650.

It is an arithmetic number, because the mean of its divisors is an integer number (7810800).

Almost surely, 2^71988434 is an apocalyptic number.

71988434 is a deficient number, since it is larger than the sum of its proper divisors (52984366).

71988434 is a wasteful number, since it uses less digits than its factorization.

71988434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65177.

The product of its digits is 193536, while the sum is 44.

The square root of 71988434 is about 8484.5998137803. The cubic root of 71988434 is about 415.9944872605.

The spelling of 71988434 in words is "seventy-one million, nine hundred eighty-eight thousand, four hundred thirty-four".