6490090 has 16 divisors (see below), whose sum is σ = 12369672. Its totient is φ = 2443264.

The previous prime is 6490079. The next prime is 6490093. The reversal of 6490090 is 900946.

It can be written as a sum of positive squares in 4 ways, for example, as 4355569 + 2134521 = 2087^2 + 1461^2 .

It is not an unprimeable number, because it can be changed into a prime (6490093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18919 + ... + 19258.

Almost surely, 2^6490090 is an apocalyptic number.

6490090 is a deficient number, since it is larger than the sum of its proper divisors (5879582).

6490090 is a wasteful number, since it uses less digits than its factorization.

6490090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38201.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 6490090 is about 2547.5655045553. The cubic root of 6490090 is about 186.5306655342.

The spelling of 6490090 in words is "six million, four hundred ninety thousand, ninety".