71266220 has 12 divisors (see below), whose sum is σ = 149659104. Its totient is φ = 28506480.

The previous prime is 71266219. The next prime is 71266231. The reversal of 71266220 is 2266217.

It is a super-2 number, since 2×71266220² = 10157748226176800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71266220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1781636 + ... + 1781675.

It is an arithmetic number, because the mean of its divisors is an integer number (12471592).

Almost surely, 2^71266220 is an apocalyptic number.

It is an amenable number.

71266220 is an abundant number, since it is smaller than the sum of its proper divisors (78392884).

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

71266220 is a wasteful number, since it uses less digits than its factorization.

71266220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3563320 (or 3563318 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 71266220 is about 8441.9322432723. The cubic root of 71266220 is about 414.5986733267.

The spelling of 71266220 in words is "seventy-one million, two hundred sixty-six thousand, two hundred twenty".