71332780 has 24 divisors (see below), whose sum is σ = 150000480. Its totient is φ = 28494720.

The previous prime is 71332769. The next prime is 71332841. The reversal of 71332780 is 8723317.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16440 + ... + 20320.

It is an arithmetic number, because the mean of its divisors is an integer number (6250020).

Almost surely, 2^71332780 is an apocalyptic number.

It is an amenable number.

71332780 is an abundant number, since it is smaller than the sum of its proper divisors (78667700).

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

71332780 is a wasteful number, since it uses less digits than its factorization.

71332780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4809 (or 4807 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 71332780 is about 8445.8735486627. The cubic root of 71332780 is about 414.7277064134.

The spelling of 71332780 in words is "seventy-one million, three hundred thirty-two thousand, seven hundred eighty".