90490 has 8 divisors (see below), whose sum is σ = 162900. Its totient is φ = 36192.

The previous prime is 90481. The next prime is 90499. The reversal of 90490 is 9409.

It is an interprime number because it is at equal distance from previous prime (90481) and next prime (90499).

It can be written as a sum of positive squares in 2 ways, for example, as 89401 + 1089 = 299^2 + 33^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (90499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4515 + ... + 4534.

2⁹⁰⁴⁹⁰ is an apocalyptic number.

90490 is a deficient number, since it is larger than the sum of its proper divisors (72410).

90490 is a wasteful number, since it uses less digits than its factorization.

90490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9056.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 90490 is about 300.8155581083. The cubic root of 90490 is about 44.8952295102.

Adding to 90490 its reverse (9409), we get a palindrome (99899).

It can be divided in two parts, 90 and 490, that multiplied together give a square (44100 = 210²).

The spelling of 90490 in words is "ninety thousand, four hundred ninety".