71405889 has 8 divisors (see below), whose sum is σ = 96150912. Its totient is φ = 47132400.

The previous prime is 71405861. The next prime is 71405909. The reversal of 71405889 is 98850417.

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

It is not a de Polignac number, because 71405889 - 2¹¹ = 71403841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71405889.

It is not an unprimeable number, because it can be changed into a prime (71405849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117529 + ... + 118134.

It is an arithmetic number, because the mean of its divisors is an integer number (12018864).

Almost surely, 2^71405889 is an apocalyptic number.

It is an amenable number.

71405889 is a deficient number, since it is larger than the sum of its proper divisors (24745023).

71405889 is a wasteful number, since it uses less digits than its factorization.

71405889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235767.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 71405889 is about 8450.2005301649. The cubic root of 71405889 is about 414.8693429109.

The spelling of 71405889 in words is "seventy-one million, four hundred five thousand, eight hundred eighty-nine".