71128458 has 24 divisors (see below), whose sum is σ = 154440000. Its totient is φ = 23658984.

The previous prime is 71128433. The next prime is 71128469. The reversal of 71128458 is 85482117.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5023 + ... + 12941.

It is an arithmetic number, because the mean of its divisors is an integer number (6435000).

Almost surely, 2^71128458 is an apocalyptic number.

71128458 is an abundant number, since it is smaller than the sum of its proper divisors (83311542).

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

71128458 is a wasteful number, since it uses less digits than its factorization.

71128458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8426 (or 8423 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 71128458 is about 8433.7689083825. The cubic root of 71128458 is about 414.3313527322.

The spelling of 71128458 in words is "seventy-one million, one hundred twenty-eight thousand, four hundred fifty-eight".