649885 has 8 divisors (see below), whose sum is σ = 793440. Its totient is φ = 510864.

The previous prime is 649879. The next prime is 649897. The reversal of 649885 is 588946.

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

It is a cyclic number.

It is not a de Polignac number, because 649885 - 2³ = 649877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 807 + ... + 1396.

It is an arithmetic number, because the mean of its divisors is an integer number (99180).

2⁶⁴⁹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

649885 is a deficient number, since it is larger than the sum of its proper divisors (143555).

649885 is a wasteful number, since it uses less digits than its factorization.

649885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267.

The product of its digits is 69120, while the sum is 40.

The square root of 649885 is about 806.1544517026. The cubic root of 649885 is about 86.6188016432.

The spelling of 649885 in words is "six hundred forty-nine thousand, eight hundred eighty-five".