71128478 has 4 divisors (see below), whose sum is σ = 106692720. Its totient is φ = 35564238.

The previous prime is 71128469. The next prime is 71128487. The reversal of 71128478 is 87482117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87482117 = 1303 ⋅67139.

It is an interprime number because it is at equal distance from previous prime (71128469) and next prime (71128487).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17782118 + ... + 17782121.

It is an arithmetic number, because the mean of its divisors is an integer number (26673180).

Almost surely, 2^71128478 is an apocalyptic number.

71128478 is a deficient number, since it is larger than the sum of its proper divisors (35564242).

71128478 is a wasteful number, since it uses less digits than its factorization.

71128478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35564241.

The product of its digits is 25088, while the sum is 38.

The square root of 71128478 is about 8433.7700940920. The cubic root of 71128478 is about 414.3313915663.

The spelling of 71128478 in words is "seventy-one million, one hundred twenty-eight thousand, four hundred seventy-eight".