71089290 has 48 divisors (see below), whose sum is σ = 186091776. Its totient is φ = 18828000.

The previous prime is 71089289. The next prime is 71089331. The reversal of 71089290 is 9298017.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10975 + ... + 16205.

It is an arithmetic number, because the mean of its divisors is an integer number (3876912).

Almost surely, 2^71089290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71089290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93045888).

71089290 is an abundant number, since it is smaller than the sum of its proper divisors (115002486).

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

71089290 is a wasteful number, since it uses less digits than its factorization.

71089290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395 (or 5392 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 71089290 is about 8431.4464951158. The cubic root of 71089290 is about 414.2552860841.

It can be divided in two parts, 710 and 89290, that added together give a square (90000 = 300²).

The spelling of 71089290 in words is "seventy-one million, eighty-nine thousand, two hundred ninety".