71493128 has 32 divisors (see below), whose sum is σ = 153471360. Its totient is φ = 30585600.

The previous prime is 71493127. The next prime is 71493167. The reversal of 71493128 is 82139417.

It is a super-2 number, since 2×71493128² = 10222534702448768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71493127) 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, 58928 + ... + 60128.

It is an arithmetic number, because the mean of its divisors is an integer number (4795980).

Almost surely, 2^71493128 is an apocalyptic number.

It is an amenable number.

71493128 is an abundant number, since it is smaller than the sum of its proper divisors (81978232).

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

71493128 is a wasteful number, since it uses less digits than its factorization.

71493128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277 (or 2273 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 71493128 is about 8455.3609030011. The cubic root of 71493128 is about 415.0382274749.

The spelling of 71493128 in words is "seventy-one million, four hundred ninety-three thousand, one hundred twenty-eight".