71389806 has 16 divisors (see below), whose sum is σ = 142885200. Its totient is φ = 23779008.

The previous prime is 71389789. The next prime is 71389841. The reversal of 71389806 is 60898317.

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 7 ways as a sum of consecutive naturals, for example, 6450 + ... + 13578.

It is an arithmetic number, because the mean of its divisors is an integer number (8930325).

Almost surely, 2^71389806 is an apocalyptic number.

71389806 is an abundant number, since it is smaller than the sum of its proper divisors (71495394).

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

71389806 is a wasteful number, since it uses less digits than its factorization.

71389806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8803.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 71389806 is about 8449.2488423528. The cubic root of 71389806 is about 414.8381930775.

The spelling of 71389806 in words is "seventy-one million, three hundred eighty-nine thousand, eight hundred six".