71891330 has 48 divisors (see below), whose sum is σ = 157101120. Its totient is φ = 23573088.

The previous prime is 71891299. The next prime is 71891389. The reversal of 71891330 is 3319817.

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 23 ways as a sum of consecutive naturals, for example, 8081 + ... + 14459.

It is an arithmetic number, because the mean of its divisors is an integer number (3272940).

Almost surely, 2^71891330 is an apocalyptic number.

71891330 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71891330 is an abundant number, since it is smaller than the sum of its proper divisors (85209790).

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

71891330 is a wasteful number, since it uses less digits than its factorization.

71891330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423 (or 6416 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 71891330 is about 8478.8755150668. The cubic root of 71891330 is about 415.8073604187.

The spelling of 71891330 in words is "seventy-one million, eight hundred ninety-one thousand, three hundred thirty".