71329420 has 48 divisors (see below), whose sum is σ = 158427360. Its totient is φ = 26901504.

The previous prime is 71329411. The next prime is 71329421. The reversal of 71329420 is 2492317.

It is not an unprimeable number, because it can be changed into a prime (71329421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127782 + ... + 128338.

It is an arithmetic number, because the mean of its divisors is an integer number (3300570).

Almost surely, 2^71329420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71329420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79213680).

71329420 is an abundant number, since it is smaller than the sum of its proper divisors (87097940).

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

71329420 is a wasteful number, since it uses less digits than its factorization.

71329420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 71329420 is about 8445.6746326152. The cubic root of 71329420 is about 414.7211946481.

The spelling of 71329420 in words is "seventy-one million, three hundred twenty-nine thousand, four hundred twenty".