71318428 has 12 divisors (see below), whose sum is σ = 124878600. Its totient is φ = 35638832.

The previous prime is 71318399. The next prime is 71318437. The reversal of 71318428 is 82481317.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 71318393 and 71318402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4998 + ... + 12946.

It is an arithmetic number, because the mean of its divisors is an integer number (10406550).

Almost surely, 2^71318428 is an apocalyptic number.

It is an amenable number.

71318428 is a deficient number, since it is larger than the sum of its proper divisors (53560172).

71318428 is a wasteful number, since it uses less digits than its factorization.

71318428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10196 (or 10194 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 71318428 is about 8445.0238602386. The cubic root of 71318428 is about 414.6998904440.

The spelling of 71318428 in words is "seventy-one million, three hundred eighteen thousand, four hundred twenty-eight".