71055240 has 128 divisors (see below), whose sum is σ = 229806720. Its totient is φ = 17510400.

The previous prime is 71055239. The next prime is 71055251. The reversal of 71055240 is 4255017.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 71055240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124155 + ... + 124725.

It is an arithmetic number, because the mean of its divisors is an integer number (1795365).

Almost surely, 2^71055240 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 71055240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114903360).

71055240 is an abundant number, since it is smaller than the sum of its proper divisors (158751480).

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

71055240 is a wasteful number, since it uses less digits than its factorization.

71055240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 71055240 is about 8429.4270267913. The cubic root of 71055240 is about 414.1891361988.

The spelling of 71055240 in words is "seventy-one million, fifty-five thousand, two hundred forty".