71234280 has 192 divisors, whose sum is σ = 257886720. Its totient is φ = 16934400.

The previous prime is 71234231. The next prime is 71234291. The reversal of 71234280 is 8243217.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 144835 + ... + 145325.

It is an arithmetic number, because the mean of its divisors is an integer number (1343160).

Almost surely, 2^71234280 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 71234280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128943360).

71234280 is an abundant number, since it is smaller than the sum of its proper divisors (186652440).

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

71234280 is a wasteful number, since it uses less digits than its factorization.

71234280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 71234280 is about 8440.0402842641. The cubic root of 71234280 is about 414.5367259767.

Adding to 71234280 its reverse (8243217), we get a palindrome (79477497).

The spelling of 71234280 in words is "seventy-one million, two hundred thirty-four thousand, two hundred eighty".