75509490 has 96 divisors (see below), whose sum is σ = 217741824. Its totient is φ = 16692480.

The previous prime is 75509479. The next prime is 75509491. The reversal of 75509490 is 9490557.

It is not an unprimeable number, because it can be changed into a prime (75509491) 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 47 ways as a sum of consecutive naturals, for example, 44742 + ... + 46398.

It is an arithmetic number, because the mean of its divisors is an integer number (2268144).

Almost surely, 2^75509490 is an apocalyptic number.

75509490 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 75509490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108870912).

75509490 is an abundant number, since it is smaller than the sum of its proper divisors (142232334).

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

75509490 is a wasteful number, since it uses less digits than its factorization.

75509490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712 (or 1705 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 75509490 is about 8689.6196694677. The cubic root of 75509490 is about 422.6691128849.

The spelling of 75509490 in words is "seventy-five million, five hundred nine thousand, four hundred ninety".