71475720 has 256 divisors, whose sum is σ = 248832000. Its totient is φ = 16321536.

The previous prime is 71475707. The next prime is 71475731. The reversal of 71475720 is 2757417.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1520737 + ... + 1520783.

It is an arithmetic number, because the mean of its divisors is an integer number (972000).

Almost surely, 2^71475720 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 71475720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124416000).

71475720 is an abundant number, since it is smaller than the sum of its proper divisors (177356280).

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

71475720 is a wasteful number, since it uses less digits than its factorization.

71475720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 71475720 is about 8454.3314342413. The cubic root of 71475720 is about 415.0045385868.

The spelling of 71475720 in words is "seventy-one million, four hundred seventy-five thousand, seven hundred twenty".