71389808 has 20 divisors (see below), whose sum is σ = 158077680. Its totient is φ = 30595584.

The previous prime is 71389789. The next prime is 71389841. The reversal of 71389808 is 80898317.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318593 + ... + 318816.

It is an arithmetic number, because the mean of its divisors is an integer number (7903884).

Almost surely, 2^71389808 is an apocalyptic number.

It is an amenable number.

71389808 is an abundant number, since it is smaller than the sum of its proper divisors (86687872).

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

71389808 is a wasteful number, since it uses less digits than its factorization.

71389808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637424 (or 637418 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 71389808 is about 8449.2489607065. The cubic root of 71389808 is about 414.8381969514.

The spelling of 71389808 in words is "seventy-one million, three hundred eighty-nine thousand, eight hundred eight".