75721268 has 18 divisors (see below), whose sum is σ = 154147266. Its totient is φ = 32451888.

The previous prime is 75721253. The next prime is 75721271. The reversal of 75721268 is 86212757.

It can be written as a sum of positive squares in only one way, i.e., 38291344 + 37429924 = 6188^2 + 6118^2 .

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 5 ways as a sum of consecutive naturals, for example, 192971 + ... + 193362.

It is an arithmetic number, because the mean of its divisors is an integer number (8563737).

Almost surely, 2^75721268 is an apocalyptic number.

It is an amenable number.

75721268 is an abundant number, since it is smaller than the sum of its proper divisors (78425998).

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

75721268 is a wasteful number, since it uses less digits than its factorization.

75721268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386351 (or 386342 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 75721268 is about 8701.7968259435. The cubic root of 75721268 is about 423.0638909281.

It can be divided in two parts, 7 and 5721268, that added together give a palindrome (5721275).

The spelling of 75721268 in words is "seventy-five million, seven hundred twenty-one thousand, two hundred sixty-eight".