649390 has 16 divisors (see below), whose sum is σ = 1336032. Its totient is φ = 222624.

The previous prime is 649381. The next prime is 649403. The reversal of 649390 is 93946.

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 7 ways as a sum of consecutive naturals, for example, 4569 + ... + 4708.

It is an arithmetic number, because the mean of its divisors is an integer number (83502).

2⁶⁴⁹³⁹⁰ is an apocalyptic number.

649390 is an abundant number, since it is smaller than the sum of its proper divisors (686642).

It is a weird number, because it is abundant, but not a pseudoperfect number.

649390 is a wasteful number, since it uses less digits than its factorization.

649390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9291.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 649390 is about 805.8473800913. The cubic root of 649390 is about 86.5968043168.

The spelling of 649390 in words is "six hundred forty-nine thousand, three hundred ninety".