71885730 has 64 divisors (see below), whose sum is σ = 199261440. Its totient is φ = 16257024.

The previous prime is 71885717. The next prime is 71885767. The reversal of 71885730 is 3758817.

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 31 ways as a sum of consecutive naturals, for example, 18606 + ... + 22134.

It is an arithmetic number, because the mean of its divisors is an integer number (3113460).

Almost surely, 2^71885730 is an apocalyptic number.

71885730 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 71885730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99630720).

71885730 is an abundant number, since it is smaller than the sum of its proper divisors (127375710).

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

71885730 is a wasteful number, since it uses less digits than its factorization.

71885730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643.

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 71885730 is about 8478.5452761662. The cubic root of 71885730 is about 415.7965636523.

The spelling of 71885730 in words is "seventy-one million, eight hundred eighty-five thousand, seven hundred thirty".