75489280 has 112 divisors (see below), whose sum is σ = 192664080. Its totient is φ = 28311552.

The previous prime is 75489263. The next prime is 75489283. The reversal of 75489280 is 8298457.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75489283) 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 in 7 ways as a sum of consecutive naturals, for example, 778192 + ... + 778288.

It is an arithmetic number, because the mean of its divisors is an integer number (1720215).

Almost surely, 2^75489280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75489280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96332040).

75489280 is an abundant number, since it is smaller than the sum of its proper divisors (117174800).

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

75489280 is an equidigital number, since it uses as much as digits as its factorization.

75489280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 75489280 is about 8688.4567099111. The cubic root of 75489280 is about 422.6314006053.

The spelling of 75489280 in words is "seventy-five million, four hundred eighty-nine thousand, two hundred eighty".