75342728 has 8 divisors (see below), whose sum is σ = 141267630. Its totient is φ = 37671360.

The previous prime is 75342727. The next prime is 75342731. The reversal of 75342728 is 82724357.

It can be written as a sum of positive squares in only one way, i.e., 65966884 + 9375844 = 8122^2 + 3062^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 75342691 and 75342700.

It is not an unprimeable number, because it can be changed into a prime (75342721) by changing a digit.

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 as a sum of consecutive naturals, namely, 4708913 + ... + 4708928.

Almost surely, 2^75342728 is an apocalyptic number.

It is an amenable number.

75342728 is a deficient number, since it is larger than the sum of its proper divisors (65924902).

75342728 is a wasteful number, since it uses less digits than its factorization.

75342728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9417847 (or 9417843 counting only the distinct ones).

The product of its digits is 94080, while the sum is 38.

The square root of 75342728 is about 8680.0188939887. The cubic root of 75342728 is about 422.3577299538.

The spelling of 75342728 in words is "seventy-five million, three hundred forty-two thousand, seven hundred twenty-eight".