75720356 has 6 divisors (see below), whose sum is σ = 132510630. Its totient is φ = 37860176.

The previous prime is 75720353. The next prime is 75720361. The reversal of 75720356 is 65302757.

It can be written as a sum of positive squares in only one way, i.e., 70291456 + 5428900 = 8384^2 + 2330^2 .

It is not an unprimeable number, because it can be changed into a prime (75720353) by changing a digit.

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 as a sum of consecutive naturals, namely, 9465041 + ... + 9465048.

It is an arithmetic number, because the mean of its divisors is an integer number (22085105).

Almost surely, 2^75720356 is an apocalyptic number.

It is an amenable number.

75720356 is a deficient number, since it is larger than the sum of its proper divisors (56790274).

75720356 is a wasteful number, since it uses less digits than its factorization.

75720356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18930093 (or 18930091 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 35.

The square root of 75720356 is about 8701.7444228155. The cubic root of 75720356 is about 423.0621924365.

The spelling of 75720356 in words is "seventy-five million, seven hundred twenty thousand, three hundred fifty-six".