71102240 has 96 divisors (see below), whose sum is σ = 186157440. Its totient is φ = 25446400.

The previous prime is 71102221. The next prime is 71102243. The reversal of 71102240 is 4220117.

It is not an unprimeable number, because it can be changed into a prime (71102243) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 124676 + ... + 125244.

It is an arithmetic number, because the mean of its divisors is an integer number (1939140).

Almost surely, 2^71102240 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 71102240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93078720).

71102240 is an abundant number, since it is smaller than the sum of its proper divisors (115055200).

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

71102240 is a wasteful number, since it uses less digits than its factorization.

71102240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 71102240 is about 8432.2144185261. The cubic root of 71102240 is about 414.2804388661.

Adding to 71102240 its reverse (4220117), we get a palindrome (75322357).

The spelling of 71102240 in words is "seventy-one million, one hundred two thousand, two hundred forty".