71216280 has 256 divisors, whose sum is σ = 257126400. Its totient is φ = 17487360.

The previous prime is 71216279. The next prime is 71216291. The reversal of 71216280 is 8261217.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 1167450 + ... + 1167510.

It is an arithmetic number, because the mean of its divisors is an integer number (1004400).

Almost surely, 2^71216280 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 71216280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128563200).

71216280 is an abundant number, since it is smaller than the sum of its proper divisors (185910120).

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

71216280 is a wasteful number, since it uses less digits than its factorization.

71216280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 71216280 is about 8438.9738712713. The cubic root of 71216280 is about 414.5018069759.

Adding to 71216280 its reverse (8261217), we get a palindrome (79477497).

The spelling of 71216280 in words is "seventy-one million, two hundred sixteen thousand, two hundred eighty".