71773650 has 72 divisors (see below), whose sum is σ = 207682020. Its totient is φ = 17665920.

The previous prime is 71773591. The next prime is 71773693. The reversal of 71773650 is 5637717.

It can be written as a sum of positive squares in 6 ways, for example, as 31438449 + 40335201 = 5607^2 + 6351^2 .

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 35 ways as a sum of consecutive naturals, for example, 285 + ... + 11984.

Almost surely, 2^71773650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71773650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103841010).

71773650 is an abundant number, since it is smaller than the sum of its proper divisors (135908370).

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

71773650 is a wasteful number, since it uses less digits than its factorization.

71773650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12300 (or 12292 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 36.

The square root of 71773650 is about 8471.9330733900. The cubic root of 71773650 is about 415.5803560694.

The spelling of 71773650 in words is "seventy-one million, seven hundred seventy-three thousand, six hundred fifty".