649430 has 16 divisors (see below), whose sum is σ = 1182384. Its totient is φ = 256800.

The previous prime is 649427. The next prime is 649457. The reversal of 649430 is 34946.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 649430.

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, 689 + ... + 1331.

It is an arithmetic number, because the mean of its divisors is an integer number (73899).

2⁶⁴⁹⁴³⁰ is an apocalyptic number.

649430 is a deficient number, since it is larger than the sum of its proper divisors (532954).

649430 is a wasteful number, since it uses less digits than its factorization.

649430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 649430 is about 805.8721983044. The cubic root of 649430 is about 86.5985822936.

The spelling of 649430 in words is "six hundred forty-nine thousand, four hundred thirty".