75129808 has 30 divisors (see below), whose sum is σ = 157022502. Its totient is φ = 34617600.

The previous prime is 75129773. The next prime is 75129809. The reversal of 75129808 is 80892157.

It can be written as a sum of positive squares in 3 ways, for example, as 22014864 + 53114944 = 4692^2 + 7288^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75129809) 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 in 5 ways as a sum of consecutive naturals, for example, 124708 + ... + 125308.

Almost surely, 2^75129808 is an apocalyptic number.

It is an amenable number.

75129808 is an abundant number, since it is smaller than the sum of its proper divisors (81892694).

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

75129808 is an equidigital number, since it uses as much as digits as its factorization.

75129808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 75129808 is about 8667.7452662154. The cubic root of 75129808 is about 421.9594908818.

The spelling of 75129808 in words is "seventy-five million, one hundred twenty-nine thousand, eight hundred eight".