71203280 has 40 divisors (see below), whose sum is σ = 170893824. Its totient is φ = 27561600.

The previous prime is 71203267. The next prime is 71203291. The reversal of 71203280 is 8230217.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11876 + ... + 16835.

Almost surely, 2^71203280 is an apocalyptic number.

It is an amenable number.

71203280 is an abundant number, since it is smaller than the sum of its proper divisors (99690544).

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

71203280 is a wasteful number, since it uses less digits than its factorization.

71203280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28755 (or 28749 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 71203280 is about 8438.2036002931. The cubic root of 71203280 is about 414.4765840381.

Adding to 71203280 its reverse (8230217), we get a palindrome (79433497).

The spelling of 71203280 in words is "seventy-one million, two hundred three thousand, two hundred eighty".