71057790 has 128 divisors (see below), whose sum is σ = 203886720. Its totient is φ = 17547264.

The previous prime is 71057761. The next prime is 71057803. The reversal of 71057790 is 9775017.

It is a congruent 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 63 ways as a sum of consecutive naturals, for example, 518602 + ... + 518738.

It is an arithmetic number, because the mean of its divisors is an integer number (1592865).

Almost surely, 2^71057790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71057790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101943360).

71057790 is an abundant number, since it is smaller than the sum of its proper divisors (132828930).

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

71057790 is a wasteful number, since it uses less digits than its factorization.

71057790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 15435, while the sum is 36.

The square root of 71057790 is about 8429.5782812665. The cubic root of 71057790 is about 414.1940908869.

The spelling of 71057790 in words is "seventy-one million, fifty-seven thousand, seven hundred ninety".