649098 has 12 divisors (see below), whose sum is σ = 1406418. Its totient is φ = 216360.

The previous prime is 649093. The next prime is 649123. The reversal of 649098 is 890946.

649098 is a `hidden beast` number, since 649 + 0 + 9 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 603729 + 45369 = 777^2 + 213^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (649093) 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 5 ways as a sum of consecutive naturals, for example, 18013 + ... + 18048.

2⁶⁴⁹⁰⁹⁸ is an apocalyptic number.

649098 is an abundant number, since it is smaller than the sum of its proper divisors (757320).

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

649098 is a wasteful number, since it uses less digits than its factorization.

649098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36069 (or 36066 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 649098 is about 805.6661839745. Note that the first 3 decimals coincide. The cubic root of 649098 is about 86.5838228738.

The spelling of 649098 in words is "six hundred forty-nine thousand, ninety-eight".