71220480 has 144 divisors (see below), whose sum is σ = 241061184. Its totient is φ = 17858560.

The previous prime is 71220473. The next prime is 71220481. The reversal of 71220480 is 8402217.

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 71220480.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71220481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64735 + ... + 65825.

It is an arithmetic number, because the mean of its divisors is an integer number (1674036).

Almost surely, 2^71220480 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 71220480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120530592).

71220480 is an abundant number, since it is smaller than the sum of its proper divisors (169840704).

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

71220480 is a wasteful number, since it uses less digits than its factorization.

71220480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 71220480 is about 8439.2227130228. Note that the first 3 decimals coincide. The cubic root of 71220480 is about 414.5099552690.

Adding to 71220480 its reverse (8402217), we get a palindrome (79622697).

The spelling of 71220480 in words is "seventy-one million, two hundred twenty thousand, four hundred eighty".