71038890 has 128 divisors (see below), whose sum is σ = 209905920. Its totient is φ = 16982784.

The previous prime is 71038883. The next prime is 71038901. The reversal of 71038890 is 9883017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 129597 + ... + 130143.

It is an arithmetic number, because the mean of its divisors is an integer number (1639890).

Almost surely, 2^71038890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71038890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104952960).

71038890 is an abundant number, since it is smaller than the sum of its proper divisors (138867030).

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

71038890 is a wasteful number, since it uses less digits than its factorization.

71038890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 71038890 is about 8428.4571541890. The cubic root of 71038890 is about 414.1573650873.

The spelling of 71038890 in words is "seventy-one million, thirty-eight thousand, eight hundred ninety".