71773530 has 32 divisors (see below), whose sum is σ = 172839744. Its totient is φ = 19074816.

The previous prime is 71773517. The next prime is 71773561. The reversal of 71773530 is 3537717.

It is a junction number, because it is equal to n+sod(n) for n = 71773491 and 71773500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5314 + ... + 13106.

It is an arithmetic number, because the mean of its divisors is an integer number (5401242).

Almost surely, 2^71773530 is an apocalyptic number.

71773530 is an abundant number, since it is smaller than the sum of its proper divisors (101066214).

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

71773530 is a wasteful number, since it uses less digits than its factorization.

71773530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8110.

The product of its (nonzero) digits is 15435, while the sum is 33.

The square root of 71773530 is about 8471.9259911782. The cubic root of 71773530 is about 415.5801244631.

It can be divided in two parts, 717 and 73530, that added together give a palindrome (74247).

The spelling of 71773530 in words is "seventy-one million, seven hundred seventy-three thousand, five hundred thirty".