649436 has 6 divisors (see below), whose sum is σ = 1136520. Its totient is φ = 324716.

The previous prime is 649427. The next prime is 649457. The reversal of 649436 is 634946.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649436.

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 as a sum of consecutive naturals, namely, 81176 + ... + 81183.

It is an arithmetic number, because the mean of its divisors is an integer number (189420).

2⁶⁴⁹⁴³⁶ is an apocalyptic number.

It is an amenable number.

649436 is a deficient number, since it is larger than the sum of its proper divisors (487084).

649436 is a wasteful number, since it uses less digits than its factorization.

649436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162363 (or 162361 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 649436 is about 805.8759209705. The cubic root of 649436 is about 86.5988489838.

The spelling of 649436 in words is "six hundred forty-nine thousand, four hundred thirty-six".