71128385 has 16 divisors (see below), whose sum is σ = 87635520. Its totient is φ = 55398720.

The previous prime is 71128373. The next prime is 71128403. The reversal of 71128385 is 58382117.

It is not a de Polignac number, because 71128385 - 2²⁴ = 54351169 is a prime.

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, 35870 + ... + 37800.

It is an arithmetic number, because the mean of its divisors is an integer number (5477220).

Almost surely, 2^71128385 is an apocalyptic number.

It is an amenable number.

71128385 is a deficient number, since it is larger than the sum of its proper divisors (16507135).

71128385 is a wasteful number, since it uses less digits than its factorization.

71128385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128.

The product of its digits is 13440, while the sum is 35.

The square root of 71128385 is about 8433.7645805417. The cubic root of 71128385 is about 414.3312109878.

The spelling of 71128385 in words is "seventy-one million, one hundred twenty-eight thousand, three hundred eighty-five".