71128406 has 16 divisors (see below), whose sum is σ = 108727920. Its totient is φ = 34890240.

The previous prime is 71128403. The next prime is 71128417. The reversal of 71128406 is 60482117.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71128403) 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, 36710 + ... + 38598.

It is an arithmetic number, because the mean of its divisors is an integer number (6795495).

Almost surely, 2^71128406 is an apocalyptic number.

71128406 is a deficient number, since it is larger than the sum of its proper divisors (37599514).

71128406 is a wasteful number, since it uses less digits than its factorization.

71128406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 71128406 is about 8433.7658255372. The cubic root of 71128406 is about 414.3312517636.

The spelling of 71128406 in words is "seventy-one million, one hundred twenty-eight thousand, four hundred six".