71520500 has 48 divisors (see below), whose sum is σ = 157042704. Its totient is φ = 28454400.

The previous prime is 71520473. The next prime is 71520539. The reversal of 71520500 is 502517.

It can be written as a sum of positive squares in 8 ways, for example, as 33500944 + 38019556 = 5788^2 + 6166^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 156272 + ... + 156728.

It is an arithmetic number, because the mean of its divisors is an integer number (3271723).

Almost surely, 2^71520500 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 71520500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78521352).

71520500 is an abundant number, since it is smaller than the sum of its proper divisors (85522204).

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

71520500 is a wasteful number, since it uses less digits than its factorization.

71520500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 71520500 is about 8456.9793661803. The cubic root of 71520500 is about 415.0911881680.

The spelling of 71520500 in words is "seventy-one million, five hundred twenty thousand, five hundred".