649398 has 8 divisors (see below), whose sum is σ = 1298808. Its totient is φ = 216464.

The previous prime is 649381. The next prime is 649403. The reversal of 649398 is 893946.

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

649398 is an admirable number.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 54111 + ... + 54122.

It is an arithmetic number, because the mean of its divisors is an integer number (162351).

2⁶⁴⁹³⁹⁸ is an apocalyptic number.

649398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

649398 is a wasteful number, since it uses less digits than its factorization.

649398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108238.

The product of its digits is 46656, while the sum is 39.

The square root of 649398 is about 805.8523437951. The cubic root of 649398 is about 86.5971599180.

The spelling of 649398 in words is "six hundred forty-nine thousand, three hundred ninety-eight".