649086 has 16 divisors (see below), whose sum is σ = 1306368. Its totient is φ = 215000.

The previous prime is 649081. The next prime is 649087. The reversal of 649086 is 680946.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649081) 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, 1291 + ... + 1721.

It is an arithmetic number, because the mean of its divisors is an integer number (81648).

2⁶⁴⁹⁰⁸⁶ is an apocalyptic number.

649086 is the 431-st nonagonal number.

649086 is an abundant number, since it is smaller than the sum of its proper divisors (657282).

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

649086 is a wasteful number, since it uses less digits than its factorization.

649086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 649086 is about 805.6587366869. The cubic root of 649086 is about 86.5832893066.

The spelling of 649086 in words is "six hundred forty-nine thousand, eighty-six".