71318890 has 8 divisors (see below), whose sum is σ = 128374020. Its totient is φ = 28527552.

The previous prime is 71318873. The next prime is 71318903. The reversal of 71318890 is 9881317.

It can be written as a sum of positive squares in 2 ways, for example, as 71115489 + 203401 = 8433^2 + 451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 3565935 + ... + 3565954.

Almost surely, 2^71318890 is an apocalyptic number.

71318890 is a deficient number, since it is larger than the sum of its proper divisors (57055130).

71318890 is a wasteful number, since it uses less digits than its factorization.

71318890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7131896.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 71318890 is about 8445.0512135806. The cubic root of 71318890 is about 414.7007859159.

The spelling of 71318890 in words is "seventy-one million, three hundred eighteen thousand, eight hundred ninety".