71355840 has 112 divisors (see below), whose sum is σ = 228234240. Its totient is φ = 18887680.

The previous prime is 71355833. The next prime is 71355853. The reversal of 71355840 is 4855317.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229285 + ... + 229595.

Almost surely, 2^71355840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71355840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114117120).

71355840 is an abundant number, since it is smaller than the sum of its proper divisors (156878400).

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

71355840 is a wasteful number, since it uses less digits than its factorization.

71355840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 71355840 is about 8447.2386020522. The cubic root of 71355840 is about 414.7723917626.

The spelling of 71355840 in words is "seventy-one million, three hundred fifty-five thousand, eight hundred forty".