75490 has 8 divisors (see below), whose sum is σ = 135900. Its totient is φ = 30192.
The previous prime is 75479. The next prime is 75503. The reversal of 75490 is 9457.
It can be written as a sum of positive squares in 2 ways, for example, as 74529 + 961 = 273^2 + 31^2 .
It is a sphenic number, since it is the product of 3 distinct primes.
It is an unprimeable number.
75490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3765 + ... + 3784.
275490 is an apocalyptic number.
75490 is a deficient number, since it is larger than the sum of its proper divisors (60410).
75490 is a wasteful number, since it uses less digits than its factorization.
75490 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7556.
The product of its (nonzero) digits is 1260, while the sum is 25.
The square root of 75490 is about 274.7544358150. The cubic root of 75490 is about 42.2632744256.
It can be divided in two parts, 75 and 490, that added together give a palindrome (565).
The spelling of 75490 in words is "seventy-five thousand, four hundred ninety".
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